Hot Chillys Men's Baja Zip-Tee With Binding 50% Polyester/ 50% Eco Polyester Made in the USA and Imported Knit in a two-tone pattern with low pile for extra warmth and ease of movement Relaxed Fit Second layer for added insulation 1/4 Zip-through collar construction for ultimate warmth and ventilation Flat seam construction reduces bulk and abrasion Soft stretch elastic binding around hem and sleeve hem