Castelli Active Cooling Sleeveless Base LayerThe Castelli Active Cooling Sleeveless Base Layer takes an innovative approach to keep you cool and dry when you're cycling in the hottest of climates. It's a must when the heat is on. Too much sweat on the skin can lead to discomfort but at the same time, sweat evaporation is essential to keep you cool when the heat is on. The Active Cooling Sleeveless Base Layer deals with this tricky conundrum via the use of innovative Polartec® Delta fabric, whereby the yarns are both hydrophilic and hydrophobic. What this means is excess moisture is drawn off the skin for dry comfort, but some moisture is also retained close to the skin. It's the rapid evaporation of this held moisture, speeded up via airflow through the open-knit design, that keeps you cooler than a standard cycling base layer. Brilliant fabric engineering in action.Worn under a lightweight summer jersey, this Active Cooling base ensures the finest level of comfort when temperatures begin to soar.Features:Materials: 51% Polyester, 45% Lyocell, 4% ElastaneBase layer to cool you on hot daysPolartec® Delta fabric features regulated drying so that the evaporative effect cools your coreSleeveless design with minimalist constructionSublimated overprintSuggested Temperature range: 25 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Active Cooling Sleeveless Base LayerThe Castelli Active Cooling Sleeveless Base Layer takes an innovative approach to keep you cool and dry when you're cycling in the hottest of climates. It's a must when the heat is on. Too much sweat on the skin can lead to discomfort but at the same time, sweat evaporation is essential to keep you cool when the heat is on. The Active Cooling Sleeveless Base Layer deals with this tricky conundrum via the use of innovative Polartec® Delta fabric, whereby the yarns are both hydrophilic and hydrophobic. What this means is excess moisture is drawn off the skin for dry comfort, but some moisture is also retained close to the skin. It's the rapid evaporation of this held moisture, speeded up via airflow through the open-knit design, that keeps you cooler than a standard cycling base layer. Brilliant fabric engineering in action.Worn under a lightweight summer jersey, this Active Cooling base ensures the finest level of comfort when temperatures begin to soar.Features:Materials: 51% Polyester, 45% Lyocell, 4% ElastaneBase layer to cool you on hot daysPolartec® Delta fabric features regulated drying so that the evaporative effect cools your coreSleeveless design with minimalist constructionSublimated overprintSuggested Temperature range: 25 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.

Castelli Pro Mesh Sleeveless Base LayerAs the peak, high summer temperatures arrive you'll be glad of the excellent moisture-management offered by Castelli's exceptional Pro Mesh Sleeveless Base Layer. The Pro Mesh Sleeveless Base Layer is made from a quick-wicking 3D mesh fabric, its large surface area is quick to pull moisture off the skin to leave you dry and comfortable as the heat and intensity of your ride rises. This removal of excess sweat also ensures you're not left cold and clammy when the pace of your ride slows or you stop for a coffee break. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name and pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.Features:Materials: 93% Polyester, 7% Elastane3D mesh fabric for excellent moisture managementSublimated print graphicWaist hem stays flat under shortsWeight: 55 gramsSuggested Temperature range: 18 to 35 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.