THERAPEUTIC EFFECT: Hot and Cold therapy reduces swelling, discomfort and pain caused by inflammation, injury, post- surgical pain & burns. It restores flexibility in a wide variety of ailments including muscle pain, spasms & soreness, arthritis. Great for swollen and puffy eyes, dark circles, sinusitis, sinus pressure, head colds, fever, muscle aches and stiffness, insect bites, sunburns, stress, fever, migraine or headache relief. DUAL SIDED, CUSTOM, SECURE FIT FULL COVERAGE FACE MASK: Made to have an exact and comfortable fit for your face, with openings for your eyes, nose, and mouth allowing you to use it without disrupting your routine. Designed with an adjustable, firm fastener closure to adjust around your head for a secure and custom fit. At 8" x 7", it completely covers the sinus, forehead, cheeks, and jaw. One side has plush, soothing fabric backing for a more comfortable, spa-like experience. EASY TO USE: Simply place in refrigerator or freezer until desired temperature for a cooling or ice pack effect. For hot use, simply place in the microwave for the indicated time on the instructions. The eye mask is then ready to relieve your swelling, aches and pains! FLEXIBLE, REUSABLE, SAFE: Made from non-toxic, medical grade gel beads with premium PVC cover, it is safe and resists tearing and leaking. Remains flexible even while cold or hot, allowing it to conform to your eyes and sinus area and reach deep into the tissue to reduce pain and tension. It can be washed by simply wiping it down. If you have sensitive facial skin to hot or cold, please do not apply this product to your face. VERSATILE: In addition to covering the eyes, the mask can be used for the head, back, neck, shoulders, arm, elbow, or wrist. It is perfect for travel, meditation, yoga, or relaxation. Just place it where it's needed and relax!