The Surrmed Hot & Cold Pack (Medium) is a versatile therapy pack that can be used for both hot and cold treatments. It helps alleviate pain, reduce inflammation, and relax muscles. The medium size is perfect for targeted areas like the neck, wrists, or knees. The pack can be heated in the microwave for soothing heat therapy or chilled in the freezer for cold therapy to reduce swelling and numb pain. This single pack offers convenient and effective relief for a variety of conditions, including injuries, sprains, or muscle soreness.