Eliminate unwanted bulk underneath an aero race jersey with the ASSOS 1/3 Sleeveless Skin Layer P1, a sleeveless baselayer built with a second-skin fit to keep us cool during a hot summer ride. The unique construction features a circular seamless mesh fabric with carbon-infused odor control that...

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Assos designed the Assosoires GT Long-Sleeve Mid Layer Top for our fall and winter rides where we want to keep our core warm and the cold at bay. It's a functional baselayer that works to keep us moving in chilly conditions, and we like that it offers enough stretch for full freedom of movement....

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For the winter days when a vest doesn't help enough, the Equipe RS Winter Mid Layer adds impressive warmth in a packable construction. The aero jersey silhouette disguises the powerfully warm and breathable insulation of the OSMOS Heavy fabric, which has a race fit to ensure smooth layering...

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The Equipe RS Winter Mid Layer continues Assos's pedigree of kitting cyclists for the harshest conditions. Made from their thickest OSMOS fabric, a brushed-back fleece, this long sleeve keeps heat close to the skin to warm against the bitter cold. The race fit and raw-hem design layer easily...

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The GTO NS DermaSensor Baselayer uses a 3D jacquard warp-knit design to pull moisture away from our skin and dry in a flash while we're flying downhill or making another burly climb.

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Adding a baselayer under an aero jersey on the hottest of days might sound counterintuitive, but when the days reach triple digits, the ASSOS NS Superleger Skin Layer keeps us cooler for longer with its body-mapped open mesh. ASSOS designed this with their push-pull jersey sleeves in mind to...

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On the hottest days, we need every trick in the book to stay comfortable on the bike: frozen bidons, pre-soaked cap, frequent shade stops. Castelli's Active Cooling Baselayer adds to our arsenal of hot-weather techniques with innovative fabric to keep our temperature well-regulated through tough...

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The Castelli Bandito Wool Sleeveless Baselayer keeps our core warm during those chilly but not-too-cold rides where a long-sleeve is too much.

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Castelli believes so much in the power of the fabric it uses to craft the Core Mesh 3 Sleeveless Baselayer that it deviated from its usual performance-related fabric monikers and named it Magic Mesh. Before you get skeptical about the fabric's otherworldly name, consider that the brand omitted...

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When we're training and racing during the spring months, the last thing we want is sweat held in fabric, keeping us too cold for the descent back down the canyon. Castelli's Core Seamless Baselayer uses a mix of polyester and polyproylene which wick moisture away from the skin better than...

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