INNOVATIVE DESIGN - EVA foam-filled interior provides durable support & won't crack or break under heavy pressure FASTER MUSCLE RECOVERY - Self-myofascial release breaks down knots & improves blood flow for quicker recovery VERSATILE - Great for flexibility & reducing pain in your back, pecs, lats, glutes, thighs, calves, feet & hip flexors AFFORDABLE MASSAGE - Multiple density zones stretch and massage away muscle tension without the cost of a masseuse https://www.amazon.ca/dp/B009LQHOG2/ref=twister_B00HJNX102?_encoding=UTF8&psc=1