Patented Filling

• The moist heat zone is held snug and secure in place by the wide elastic strap with velcro 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.