Fairtex Heavy Bags Constructed of Syntek Leather with heavy duty water resistant and non-tear nylon lining with nylon web straps. Multi-purpose designed for punch, high and low kicks, hand and foot jabs, and other drills. Good for both Muay Thai and Boxing. Balance weight and does not move too much during training. Improved design now has an overhanging top section for better training uppercuts. We recommend using a swivel on Fairtex punch bags which allows the bag to freely spin, increasing the life of the straps.