ExOfficio Men's Size Large button front lightweight quick dry shirt with long adjustable sleeves. Lots of great features including two front pockets with velcro (one with zipper), vented sides, rod holder, 2" side slits, extendable back collar. 80% nylon, 20% polyester, machine wash cold. Length is 30.5" at center back and measurement across front from armpit to armpit is 25". For some reason my camera doesn't capture the color very well - it is an apple green, best shown in first 3 photos. No wear or defects and from smoke-free home.