Nontoxic packs freeze quicker Maintains low temperature longer and stays flexible when frozen, to mold around painful areas for optimum therapeutic benefit. Insulated design retains cold longer, protects skin and prevents condensation. Comfort-Flex� elastic strap secures the system and provides customized compression, allowing the user to maintain activities during cold therapy. Plush Stay-Put� cover is fully removable, for machine wash and dry. Several configurations available to conform to specific area of the body requiring cold therapy.