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...

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.

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...

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...

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.

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...

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...

Castelli's Miracolo Wool Sleeveless Baselayer keeps our core warm on high-intensity, cool weather rides with its mesh construction made of merino wool, nylon, and elastane. Its minimalist construction is bulk-free, allowing for a comfortable fit beneath our skin-tight jersey.

The Castelli Pro Mesh 2. 0 Sleeveless Baselayer provides the moisture management we need to keep us dry during cool to mild weather rides. The sleeveless construction and waist hem stay perfectly in place as we ride, making it the perfect base layer for spring riding.

There are days when you can't decide whether or not to wear a base layer and you waste time with a debate you can't answer. Craft's Cool Mesh Superlight Sleeveless Base Layer answers the question for you. Wear it. This is as minimal as a base layer can be. The top is made of Craft's C017...