What is the 4ft Tethered Punchbag? Featuring a synthetic hide material with heat pressed laminated finish to ensure optimum tear resistance, the 4ft Tethered Punchbag by BBE is a heavy duty punch bag designed to hold shape during even the most powerful of rounds. A highly durable product, the bag features a number of characteristics that ensure optimum performance during use such as stitched chrome d-rings, a tethered loop to prevent swinging & a 23kg weight.