Relief Meets Relaxation: Experience relaxation and gentle relief from stress and stiffness while reducing discomfort around your wrists, palm, and thumb. Hot and Cold: Place the sleeve in the freezer for up to 2 hours for cold therapy or heat in the microwave for 30-40 seconds to enjoy up to 15 minutes of soothing heat. (the choice is yours). Convenient Comfort: Finished with a soft-touch fabric, this hand sleeve is comfortable and contoured to soothe sore areas. Contoured Hydrogel Design: Filled with flexible hydrogel, the sleeve comfortably molds to your hand, wrist, and thumb, providing targeted relief and relaxation without restricting movement. One Size Fits Most: With a stretchable, contoured design, the Homedics Hot and Cold Gel Hand Sleeve provides a comfortable, secure fit for a variety of users.