Everlast C3 100-Pound Foam Elite Heavy Bag: * Everlast contoured closed-cell C3 foam technology provides increased cushioning and force dispersion * Resilient design maintains bag integrity * The Everlast 100-lbs. Heavy Bag"s poly-canvas sleeve increases durability and cushions punches * Stuffed with a custom filling of natural and synthetic fibers blended with sifted sand * Everlast 100-lbs. Heavy Bag is made with the double end attachment loop on the bottom of the bag. * Durable webbing system with heavy-duty nylon straps and double end loops.