A well-designed UV protective race jersey with a great fit and performance. The short sleeve jersey performs well in hot weather with excellent cooling and a figure-hugging aero fit. The main fabric Actor is comfortable next-to-skin. Fast drying with a moisture wicking finish to promote evaporation. UPF 50+ rating for sun protection. Fan-shaped mesh on lower back is breathable for ventilation. Helping with breathability is the full zip, so if you do end up getting too hot despite its breathability you can just unzip and let in more air. A lay-flat neck design, seamless bonded sleeves, and an Italian silicone gripper lined waistband take care of the extremities. Gracious three pockets for carrying food and spares, and these are well supported so they don't sag even when loaded to the gunnels. Features Unrestrictive low collar Clean bonded sleeve finish Italian gripper Waist Band Reinforced 3 back pockets with a bonus zippered security pocket 22°-34°C / 70°-95°F Actor UPF 50+ (main fabric): 74% Polyamide, 26% Elastane, 120GSM Fan-shaped mesh (secondary fabric) : 82% Polyester, 18% Elastane, 100GSM