These Thai bags are made from one piece of material and reinforced at the seam resulting in a stronger bag then the traditional four seam bags used by competitors. All our Thai bags are 100% clean, and new rag stuffed. No bags contain fillers such as sand! The material is compressed and results in a "perfect" bag that is not too hard but not too soft. Hanging straps are reinforced and designed to last. These Thai bags also contain an under-strap to fix the bag to the floor to control swing. All bags include chains. All our bags are proudly made in the USA.