Spun polyester has an exceptionally soft hand and feel; Four way stretch for unlimited movement; Relaxed fit for casual or performance wear; Activated carbon enhances thermal regulation and odor blocking properties; Moisture Transfer Fibers move moisture away from skin to keep you dry; UPF 30 protection; Material: 86% Polyester, 14% Spandex; Warmth factor 7 out of 10 - Relaxed fit stretch fabric for warmth in cold conditions