Ice Horse Knee Wrap Single First+Ice packs mold to the horse's legs for maximum coverage and stay cold for over 2 hours. First+Ice is reusable. When done, simply place your packs back in the freezer. Within hours they are ready to use again. Ice Horse Knee Wraps are made with Quadraspan anti-migration fabric. Our unique breathable fabric keeps the wraps in place on the horses leg and the ice compressed against the area being treated. Specially placed Velcro closures allow for a secure tight fit every time. Removal is easy - no yanking or jerking on the tabs to undo .