Combines the convenience of mobility with the benefits of moist heat therapy. Comfortable soft fleece absorbent crystal fill to prevent mold/mildew and wide elastic strap straps hold the pad snug and secure. Features:The moist heat zone is held snug and secure in place by the wide elastic strap with strap closure.Delivers heat where it is needed.Convenient moist heat therapy.Non-allergenic Crystal Fill won t leak develop unpleasant odors or allow growth of mold & fungus.Moisture Absorbing: Fill crystals have honeycombed surfaces to absorb the maxiumum amount of moisture.