Just as training on a muay thai bag is an art, so is manufacturing of it. Aries Leather Muay Thai bags are made like none other on the market. Firstly, the leather thai bags are made out of top grade 1.2 mil thick genuine cowhide leather. Most other bags are made out of split leather, which in fact is processed animal fat and not genuine leather. This causes the surface to crack over time. Secondly, aries leather bags are laminated on the inside with 18oz canvas, which prevents our bags from warping and twisting over time. Our bags retain their shape after years of use and abuse. Thirdly the bags are double stitched throughout and the inside stitched edges are enclosed in denier with interlock stitching, making it four layers of stitches for extra strength and durability. The leather suspension straps are enclosed with webbing that is stitched 10 inches down from the rim of the bag, with a bust strength of 2000lbs. If there is a better made leather muay thai bag on the market, we would like to know about it.