Polar Ice® Cold Pack with Wrap Knee Standard 13 X 16 Inch Nylon / Polyester / Water Reusable (1106916_EA) 1/EAUse on your knee post surgically, during rehabilitation and following physical activity; it's effective to provide pain relief for bruises, sprains or injuries requiring cold therapy. Polar Ice delivers the benefits of cryotherapy with compression for soft tissue trauma. By reducing pain and controlling edema or swelling, cold therapy allows faster return of normal function Encapsulated ice packs filled with purified water are encased in soft fleece