Almost gone! Middle School Physical Education Recommendation Federation Product Made with Asahi Kasei fibers High-grade processed fabric Excellent elasticity Absorbs water and sweat well Surface: 100% polyester Lining: 50% cotton, 50% polyester Long-term storage item, still in the bag. If you would like to check the elasticity of the rubber by taking it out of the bag, please comment. It is basically kept in the bag. Some items have been taken out of the bag for photography. I received this as a gift, but I won't be using it, so I'm putting it up for sale. Please understand that this is a sale of unwanted items.