This product is a set of 8 mouth guards designed to provide A+ protection for athletes during sports activities, particularly football. The guards are made of plastic and come in multicolor. They are suitable for all player positions and are one size fits all. The mouth guards are adjustable and were manufactured in China in 2011. The product weighs 0.3 lbs and is intended for unisex adults. There is no manufacturer warranty and no California Prop 65 warning.