Used a black belt at first and found the end of the belt started to peel off within 2 weeks. Later, after using the brown belt only 2 times, the problem was discovered. The reason was a slight contact with the belt frame when installing the belt head. This was caused by the rougher surface of the inner layer of the belt. framework. The quality of the goods is unsatisfactory. The product page says it can be returned at any time, but there is no menu with links to return the product, only a comment function. The seller's description differs from the actual situation.