Reusable compress with non-toxic gel, safe for the whole family, environmentally friendly for safe hot and cold use per case. The Nexcare ColdHot Therapy Pack Flexible is a thermotherapy / cryotherapy (medium-sized) compress with extra comfort for natural pain relief. Non-toxic and 99% biodegradable, it is safe for the whole family. It can be used hot or cold and is available with a comfortable protective cover with rubber to keep the water heater / ice pack in place. Its new protective cover is designed from Thinsulate microfibers that offer the highest insulating protection. It allows the temperature to be maintained, whether it is to be used for cryotherapy or as a hot water bottle, for a long time, providing greater convenience. HOW DOES IT WORK You can store it in the refrigerator or freezer for immediate use as a cold compress, to reduce swelling, inflammation and pain, or just heat it in a microwave or hot water for quick heating to relieve pain and treat stiffness, muscle spasms and pain. CHARACTERISTICS It offers immediate and natural pain relief. Cold compress for swelling, inflammation and pain. Warm compress for muscle pain and stiffness. Rubber for tying in the application position. Ideal for the extremities. Made from 99% biodegradable gel. Protective cover included for comfort. USE Cold or hot can be used for quick pain relief. You can store it in the refrigerator or freezer for immediate use as a cold compress, to reduce swelling, inflammation and pain. Heat it in a microwave or hot water for quick heating to relieve pain and treat stiffness, muscle spasms and aches. Safe gel for the whole family.