Product material: gel, nylon, flannel Product size: 60*45*2cm Heat or Cold Therapy - Heat and cold therapy can help relieve neck, shoulder and back pain. Hyperthermia provides deep comfort throughout the target area, relieving tension, stress and pain. Simply heat a moist heating pad in the microwave for hyperthermia, and cold therapy effectively reduces inflammation and swelling by confining blood vessels to the muscles and surrounding tissues. Cool microwave neck and shoulder wraps for cold therapy in the freezer. Contours to the body and stays in place - With a high neckline, extra wide shoulders, extra long chest coverage and a back profile, this neck heating pad fits around your neck and shoulders for complete comfort . Since the weight of the padding is evenly distributed and the weighted heated neck wrap maintains balance and keeps the neck and shoulders stable, the upgraded design is universally suitable for most body types. Easy to use anytime, anywhere. Working at a desk, sitting on the sofa, preparing a meal, or even driving, this neck warmer or cooling pack provides maximum comfort and effective pain relief. Heating precautions: microwave for 1 minute, then take out and shake well, flip and heat for another 30 seconds. The total heating time should not exceed 2 minutes. Refrigeration precautions: Please put it in the refrigerator for 1 to 2 hours.