Achieve True Blue Elbow Guard Stretchable cotton is the material used in these HWKY Elbow Pads. They are gear that resembles socks and slides over the elbow before fastening with a velcro strap. These elbow protectors have padding along the outside of the elbow made of soft, durable foam. Strong seams are used on all of the elbow pads' edges for durability and to keep the fabric from fraying. The elbow guards are perfect for most Muay Thai & Kickboxing competitions. However, they are not recommended for training due to the thin padding. Material : Stretch cotton material Soft foam in the elbow area Strong seams Elastic strap for secure locking in the elbow