Unna Flex® Plus Unna Boot, 4 Inch x 10 Yard, 1 Case of 12 Pipettes and Pipettors © ColdCOMFORT Knee therapy system Two 1 inch urethane © ColdCOMFORT Knee therapy system is an articulated design that surrounds the entire knee for maximum therapeutic benefit * Comfortable secure fit lets you relax or allows you to continue activities during therapy sessions * Includes 12 x 13 fabric holster with elastic and Velcro straps and two 6 x 12 cold packs * Pack stays flexible when fully frozen to mold around painful area * Pack quickly reaches freezing temperature * Pack maintains low temperature longer for optimum therapeutic benefit * Pack has non toxic fill enclosed in latex free vinyl * Pack is durable enough to be used several times a day * Plush Stay Put fabric cover retains cold longer and protects skin from tissue damage * Cover has Comfort Flex design shapes to your body for close contact and maximum benefit * Cover has foam cushion is soft and gentle on painful areas * Cover prevents condensation from wetting the skin or clothing * Cover is fully removable can be machine washed and dried to maintain freshness and new appearance * Strap has Velcro© at both ends to be fully detachable * Strap has generous width for stability * Strap is long enough for virtually unlimited positioning options * Strap provides customized compression * Strap allows the user to maintain activities during cold therapy * The McKesson nonwoven sponge won't fray or produce lint over time 4 inches x 10 yards elastic Unna boot works just as well as other Unna boots but is not rigid