The RETRO SERIES Punching Bag is a durable club bag crafted from dark tan colored marble grain leather, reinforced with synthetic leather cross fiber bonded black panels for added strength. It is built to endure regular, intense workout sessions. The bag features 4 heavy gauge D-Ring hangers that are attached to the bag using double layers of leather and nylon webbed strapping, which are cross-stitched into the main material of the bag for added durability. The bag can be filled and sealed securely with a heavy duty zip, which is further protected by an additional flange of material to keep the zip hidden and unexposed. Additionally, a metal D-ring is sewn to the base of the bag to attach a fixing or weight to reduce the bag from swinging during heavy workouts. It is recommended to check regularly for wear and tear of the swivel fixing attachment above the chain strands when using our heavier punch bags hung with either our 4 or 6 strand chains. This swivel fixing can be replaced separately without complete replacement of the chain set.