We created it to adapt our ultimate hot-weather endurance jersey for the brightest, sunniest climates. Full-length sleeves wrap the rider’s arms in UPF 50+ with a lightweight, hyper-wicking textile inherited from the Racing Series line. The body is made from ultrabreathable, ultra-cooling textiles that breathe like racing equipment but are cut in our streamlined RegularFit. Though the full-length sleeves are UPF 50, the GT body textiles (UPF 15) are so lightweight that we recommend wearing sunscreen underneath them.