The large assortment of Functional Forms Rolls with varying densities are used for a wide variety of positioning purposes. The provide elevation to relax the head and neck, knees, ankles, low back and more.Made of anti-bacterial/anti-fungal, water resistant, breathable nylon that is made specifically for health care applications and is easy to wipe clean with neutral soap suds and lukewarm water. Then rinse and dry. Soft, washable anti-slip surface on bottom. Meets CAL 117 fire regulations. No latex. Also available in soft vinyl.