Experience incredible breathability and unparalleled flexibility in the ProForce 10 oz Karate Jacket - 60/40 Blend. Constructed of a 60% cotton and 40% polyester blend, this jacket has UCV (Ultra Channeling Ventilation) mesh on the armpits for a cool, dry fit and side openings for a better free range of motion. Plus, its reinforced stitching ensures exceptional durability for even the most vigorous practice sessions and tournaments.