US ARMY PT PHYSICAL FITNESS IPFU ARMY UNIFORM JACKET 100% NYLON, MEDIUM/REGULAR The Army Physical Fitness Training Uniform Jacket is made of high-performance fabrics that resist wind and rain while keeping you comfortable by allowing moisture vapor to pass through. Other comfort and safety features include front and back V that is reflective from back and front of the jacket. Dont Forget these Jackets were designed to adhere to all Weather to include Snow and Rain .