Sivan Health and Fitness Hollow Foam Roller Designed to help release trigger points and loosen tight muscles for improved flexibility, especially in commonly tight areas such as the back, calves, IT band, hamstrings, lats, and glutes Ideal for beginner and intermediate users, the dense foam structure provides moderate pressure to break up knots and relieve pain, and is firm enough to support all body types Provides an unstable yet firm surface that makes it a versatile fitness tool for Pilates core work, rehab exercises, spine stabilization, balance work, stretching, and body-awareness Eases muscle tightness and increases blood circulation for faster recovery and reduced soreness, without the pain that extra firm, high-density foam rollers can cause Made out of non-toxic EVA foam that is easy to clean; comes in 36 x 6 that is suitable for anyone, and a compact 12 x 6 for easy transport