The Shires Arma Cool Hydro Therapy Boots offers cold water therapy in a boot. It features micro-crystals that turn to a cooling gel when soaked in water. These crystals swell into the quilted fabric spaces to form a soft gel pad that hugs all parts of the leg when the boot is fitted. The cold compress reduces inflammation, swelling and bruising, cools tendons after exercise and treats soft tissue injuries. They are mess free and reusable and the gel is contained within the fabric quilting and returns to micro-crystals when dry. Touch close fastenings. Set of two.