The 13-inch Plain Green Roller Foam is a fitness and recovery tool commonly used for self-myofascial release and muscle massage. This foam roller is designed to assist in relieving muscle tightness, improving flexibility, and promoting blood circulation. The plain green color adds a simple and clean aesthetic to the roller. Users typically incorporate foam rolling into their fitness routines to target specific muscle groups and alleviate muscle tension. The 13-inch size makes it a versatile tool suitable for various exercises and stretches.