This item was mistakenly purchased on another handmade site and immediately returned. However, there are signs it was worn once, so it is being sold as a used item. There are absolutely no functional problems. The item is made of 1mm leather, dyed blue, and waterproofed. It fits instruments with a mouthpiece that bends from the end of the left palm, such as those that are not Alexander 103-style, which have a mouthpiece that bends from the middle of the left palm.