A must-have for serious athletes and active adventurers to help tired muscles heal and recover. Hard, hollow core wrapped in foam makes it harder than traditional foam rollers. Proprietary Distrodensity zones replicate the feel of a massage therapist's hands. Firmer and more durable than most foam rollers. Environmental design uses less foam than traditional foam rollers. Allows for self-massage. Promotes the flow of blood and oxygen to your tired muscles. Helps roll out tight muscles, knots and kinks. Imported.