SHERPA ADVENTURE GEAR Men's Karma Zip Tee 100% Polyester Imported Seams are places off the tops of the shoulders for non-chaffing comfort under pack straps Main fabric is light two-sided fleece brushed on both sides for comfort and warmth Contrast panels are made of a high performance two-sided fleece Includes Polygene anti Microbial technology Underarm gussets provide seamless comfort and enhanced mobility