The Fairtex HB11 is a heavy and compact punching bag. It is ideal for boxing training, especially made for training uppercuts. This heavy bag's outer shell uses Syntek Leather. Inside, there is a heavy-duty nylon lining that is water and tear resistant. The industrial strength nylon web straps have extra stitching and rivets to reinforce key stress points. World class materials and construction make this Fairtex HB11 punching bag super durable. This bag is ready for endless uppercuts! The HB11 will weight approximately 21kg after you fill it. It will be roughly 50cm in diameter, with a height of 63cm.