Combines the healing power of hot & cold therapy into one convenient pack. Enjoy extraordinary relief from your everyday aches & pains and feel the optimal therapeutic benefit as our pearl technology conforms to your body. Reusable therapeutic hot & cold pack for use with common aches, pains, swelling and bruising. Packs are designed to retain a therapeutic temperature for approximately 20 minutes. Therapearl colorsmart pearls change color when they achieve targeted hot or cold temperature. Non-toxic. 9 in x 2.75 in (22.9 cm x 7 cm). Product Benefits.