Hot Chillys Men's Clima-Tek Base Layer Pants - This advanced base layer provides the ultimate in comfort for active outdoor use. The Clima-Tek fabric features a buttery soft, cottony hand, with all of the performance of a polyester/spandex. Four way stretch for unlimited movement Relaxed fit for casual or performance wear Activated carbon enhances thermal regulation and odor blocking properties Mositure Transfer Fibers move moisture away from skin to keep you dry Hot Chillys signature elastic waist band Front fly UPF 30 protection Spun Polyester has an exceptionally soft hand and feel 86% Polyester/14% Spandex Style: HC5603