Castelli Pro Mesh 4 Sleeveless Baselayer - Women's Niagara Blue, M

For an ultralight base that won't hold onto sweat, we kit up with the Castelli Pro Mesh 4 Sleeveless Baselayer. The full mesh construction wicks away moisture and dries off quick to ensure we don't get sweat-logged or overheated on climbs, while the low-profile hem lays flat under our tights for a streamlined look.