DURABLE and SAFE: Double sealed seams, cotton edges, non-toxic, thick nylon exterior. The gel packs are leak-proof, microwavable, and quick to cool in the freezer. Physical therapists and sports doctors recommend it for back pain relief but also for arthritis, inflammation, menopause-related hot flashes, and headaches. FLEXIBLE from FROZEN: usually means that they get warm very fast. Our 2 types of gel packs for icing injuries allow you to decide the level of freezing cold you need. FLEXICOOL provides instant pain relief to treat fever, bruises, sprains, strains and helps manage swelling. EXTRACOLD is for long-lasting cold compress therapy. COMPATIBLE with zenKeyz SHOULDER BRACE and MOST braces with an ice pocket: Whether you need a shoulder ice pack for your rotator cuff injury or shoulder dislocation, our large ice pack fits perfectly in the pocket provided by shoulder braces. VERSATILE DESIGN: Suitable for both HOT and COLD therapy, our reusable gel ice packs come in a UNIQUE SHAPE that contours the body and speeds recovery from injuries. Try our soft ice pack for shoulder, knees, hips, neck, or back injuries. FLEXICOOL or EXTRACOLD? - Because cold is subjective we designed two different medical ice packs with a proprietary gel interior that stays colder for longer. A flexible cold compress for icing injuries and an extra cold pack that is great for post-surgery cold therapy.