REUSABLE - Can be used for BOTH warm and cold compression. The gel pack is reuseable and can be freezable while still remaining soft or heated in the microwave. Serves as an ice pack or heating pad. Perfect for any body part: Knee, Arm, Thigh, Leg, Foot, Lumbar, Cervical, Upper and Lower Back, Shoulder, Rotator Cuff, Neck, Calves, Shins, Hips and more . FAST RELIEF, ANYTIME, ANYWHERE - Keep one handy in your fridge for a first aid icing emergency or your everyday comfort from pain. Just strap on and get the soothing relief from hot or cold therapy right away. Delivers up to 30 minutes of soothing cooling or heat relief for aches and pains TRUSTED - Recommended by Physical Therapists, Doctors, Sports Trainers and Chiropractors. Transforming Life has a non-toxic gel contained in a leak-proof blue plastic pack with elastic Velcro straps Can be used in all body parts like Back, Knee, Waist, Shoulder, Ankle, Calves and Hip etc for pain relief. Ideal for Arthritis, Sciatica patients as well as first aid and sports pain relief.