Polyethylene foam rollers with TufCoat finish are perfect for positioning, balance, postural and muscle re-education, spinal stabilization, body awareness and coordination, and ranging and strengthening activities. Round rollers offer progressive exercise sequences - user can graduate from an easier (smaller diameter) to a more difficult (larger diameter) roller. Half round roller is a great tool for ankle stretching and knee rehabilitation. Diameter refers to the width of the half-round profile. The PE rollers with TufCoat are strong enough to be used by large adults and active children. Foam rollers are available in 36in. and 12in. lengths with either a round (circular) or half-round (semi-circular) profile. Available in 6in. and 4in. diameters. This line of rollers is available with white foam and blue TufCoat. The TufCoat is a solid plastic-like coating layer on the exterior of the foam roller that adds a level of firmness and wash ability.