Teamed up with Tactical Innovations Canada to produce the most amazing OTW on the Canadian market. Ventilation around the sides and under the arms- 1 inch shorter sleeves- 2 inch longer core to better tuck in your shirt. Arm fabric is 65% polyester 35% cotton ripstop.Vented fabric is 100% polyester Front and back panels is 85% cotton 15% polyester for added durability Zipper is 100% Nylon. This item is not approved or endorsed by the CAF. It also is not recommended for combat use, it does not contain IR fighting materials, and is not flame retardant.