Muay Thai Kick Boxing Punching Bag. Professional quality, heavy duty muay thai bag, proudly made in the USA Included with this Muay Thai Bag is a Lifetime Warranty Certificate, which Protects Your Heavy Bag Against Any Damage with the Only Exclusion of damage Caused by Weather and Sharp Objects Heavy bag chain with swival and a punching bag spring is also included. Only filled with fabric to a perfect desity. Heavy duty D-ring sewn on the botton for anchoring if needed.