Great for temperature regulation when out cycling on warm days. The Q-Wic fabric is lightweight will wick sweat away from your skin keeping you cool. Whilst the half zip can aid with breathability. With 2 patch pockets on the back give you convenient storage for small essentials.Q-Wic lightweight polyester fabricWicking fabric moving moisture away from the skinQuick drying1/2 length centre front venting zip with autolock slider & inner zip guard2 compartment pockets to rearReflective details for enhanced visibility100% Polyester