Hot Chillys Men's Clima-Tek Quarter Zip Long Sleeve Base Layer Shirt - This Clima-Tek fabric features a buttery soft, cottony hand, with all of the performance of a polyester spandex. Perfect for summer camping in the mountains and winter wear anywhere. Quarter zip High collar Relaxed fit for casual or performance wear Four way stretch for casual or performance wear UPF 30 sun protection 86% polyester 14% spandex Style: HC5609