Made of white, polyethylene foam, the half-round roller sits 3 inches high and is ideal for ankle stretching and knee rehabilitation. Terrific for muscle restoration, massage therapy, sport recovery, and physical therapy due to its ability to increase blood flow and improve blood circulation. Can also improve positioning, balance, body awareness and coordination, and strengthening activities. Great option to use in tandem with CanDo exercise bands, tubing, weights or balls. Easy to clean after each use. 6 inches high and 36 inches in length.