<b>This pack includes one Reusable Gel Packs AND Adjustable Comfort Strap, which can both be used for either HOT OR COLD therapy.So you can use them all over your body. –medical-grade gel packs are safe for heating and freezing, while easily rotating between the two. Made with a safe, non-toxic gel, these packs stay FLEXIBLE when frozen, and are encased in a sturdy, leak-proof durable vinyl.</b><br><b>Use Both Hot and Cold： Our packs can be used both for both hot and cold therapy, unlike competing packs that can only be used cold. Hot-- Place the gel pack in boiling water for 3-8 minutes, or, heat up water in the microwave and immerse for 3-5 minutes with medium-high heat. **For safety of keeping contents inside the compartments, it is not advised to place gel pack in microwave for heating. Cold-- Place the gel pack in the freezer for 20-60 minutes or in the refrigerator for more than 1 hour. </b><br><b>Great for use on nearly any body part, including: shoulder, upper/lower-back, knee, elbow, lower abdomen, wrist, rotator cuff, head, eye, perineal, ankle and foot.</b><br><b>Useful for common conditions, including: wisdom teeth surgery, torn ACL/MCL, broken bone, fever, bruise, sprain, strain, hernia, plantar fasciitis, tendonitis and shin splints. </b><br><b>Useful for a variety of sports athletes, including those who play football, soccer, running, gymnastics, swimming, golf, tennis, baseball and basketball and many more.</b><br> <b> **However, before you put them on the skin, you should always check how it feels against your skin and limit treatment times based on comfort and therapy requirements. When in doubt, seek the advice from your physician.</b><br><br><b>Product Details:</b><br> <b>·One (1) Reusable Hot and Cold Gel Packs</b><br> <b>·One (1) Adjustable Comfort Strap with Hook-and-Loop Closure</b><br> <b>·Soft, Smooth, and Flexible Vinyl</b><br> <b>·Boiled Water Heating and Freezer Cooling Safe</b><br> <b> ·Velcro Closure</b>