This economic, durable Everlast 70 lb. Boxing Heavy Bag is built to endure the rigors of even the toughest gyms. The bag's colorful "USA" covering is made of synthetic Nevatear, a leather-like mildew resistant vinyl, and is filled with sifted sand and high-density shock absorbing fibers that protect your hands. It's a sturdy, comfortable bag that will withstand the rigors of your most intensive workout, at home or in a gym or training studio. Chain assembly included.