Targeted Hot and Cold Therapy for Lower Back Pain Relief Turn your existing lumbar support into a powerful hot or cold therapy system with the Brace Direct Back Ice Pack Insert. The flexible 8.5 in. by 9 in. gel pack contours perfectly to your lower back, calming swelling with cold therapy or relaxing tight muscles with heat. It slides securely into the pocket of most back braces, allowing you to manage muscle knots, sprains, and arthritis discomfort while continuing your daily routine. KEY FEATURES: EASY SIZING FOR YOUR THERAPY INSERT: One universal gel insert measures 8.5 in. wide by 9 in. tall and slides into the pocket of most back braces DUAL HOT AND COLD THERAPY: Freeze the insert to reduce swelling and numb sharp pain, or warm it in the microwave to relax tight muscles and stiffness ERGONOMIC LUMBAR CONTOUR: The pack conforms to the curve of the lower back so temperature spreads evenly across the sore area FITS MOST BACK BRACES: Slides into the insert pocket of most lumbar supports and belts to keep therapy securely in place STAYS FLEXIBLE WHEN CHILLED: The gel molds to your body instead of freezing into a rigid block, ensuring close and comfortable contact REUSABLE AND DURABLE: Built for repeated freezer and microwave cycles, replacing single-use disposable packs PERFECT FIT GUARANTEE: Free virtual fitting and adjustment session with US-based brace specialists MEASUREMENT: One universal size. The insert measures 8.5 in. wide by 9 in. tall and slides into the insert pocket of most back braces and lumbar supports. No size selection is needed. Measure the inside pocket of your back brace to confirm it accepts an 8.5 in. by 9 in. pack. If your brace has no pocket, the insert can be held in place under the brace or a wrap. For personalized sizing assistance, take advantage of our Perfect Fit Guarantee. INDICATIONS: Osteoarthritis pain Strains Sprains Cramps Muscle knots Tight and stiff muscles Overexertion Muscle spasms Pulled muscles Sudden back pain Acute injuries Back arthritis Back sprains Lower back pain Swelling Inflammation