Molded composite foam rollers 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. The molded rollers are strong enough to be used by large adults and active children. Foam rollers are available in 36", 18" and 12" lengths with either a round (circular) or half-round (semi-circular) profile. This line of rollers is available in black. The molded composite foam rollers are more firm than the polyethylene roller and are rugged.