Castelli Active Cooling Sleeveless Base Layer

##Castelli Active Cooling Sleeveless Base Layer Worn beneath your jersey; the Castelli Active Cooling Sleeveless Base Layer is a hot weather essential. The combination of fabrics helps retain some moisture against the skin; allows the air to flow freely and; in turn; brings an evaporative cooling effect to your core. It’s best worn with a lightweight jersey and has a sleeveless; minimalist design.