Designed specifically for core training, balance work and body alignment, the OPTP Anatomical Roller™ is the only foam roller that naturally supports and aligns the spine during exercise. An anatomically shaped groove, one rounded side and two uniquely tapered ends make the Anatomical Roller unlike any other foam roller. It supports the spine in alignment, enhances many exercises and allows modification of the challenge level with its stable and unstable positions. Use it for core, balance, posture, therapy, Pilates, stretching and more. Constructed of EVA foam for durability.