Securely stows compact handgun and magazines/ speed loaders or mp3 player. Opaque outer mesh layer obsecures profile of handgun. Mesh shoulder yoke supports the extra weight of a concealed handgun and eliminates sagging. Moisture wicking. Flat lock seams reduce friction and prevent chafing. Velcro pocket locks to keep hidden gear secure anti-microbal. 80% polyester/ 20% spandex.