Features: 1.Heat or cold therapy-Heat and cold therapy help relieve pain in the neck, shoulders and back. Hyperthermia provides deep comfort throughout the target area, relieving tension, pressure and pain. You only need to heat the hot and humid heating pad in a microwave oven for hyperthermia. The cold therapy restricts the blood vessels to the muscles and surrounding tissues, thereby effectively reducing inflammation and swelling. Cool the neck and shoulder wraps of the microwave in the freezer for cold therapy 2. Conform to the contours of the body and keep it in place-Designed with high collar, extra wide shoulders, extra long chest cover and back side design, this neck heating pad can fit your neck and shoulders, making you completely comfortable. Because the weight of the filling is evenly distributed, the weighted heating neck wrap can maintain balance and keep the neck and shoulders stable, so the upgraded design is generally applicable to most types of bodies. 3. Easy to use anytime, anywhere. When working at a desk, sitting on a sofa, preparing a meal, or even driving, this neck warmer or cooling pack provides maximum comfort and effective pain relief. >>for knee Specification: Product name: Maelstrom cold and hot compress pad Material: gel, nylon spun, flannel Product color: gray knee pad size: 46 x 24.5 x 2CM Packing content or method: frosted bag and color box color: gray Certification: MSDS Usage: refrigerator refrigeration, microwave heating Note: Heating matters needing attention: the microwave for 1 minute, then take out shaking evenly, flip and reheat 30 seconds.The total heating time not more than 2 minutes. Cold storage precautions: please put it in a refrigerator can be 1 to 2 hours. Packing List: Hot and Cold Compress Knee(shoulder) Pad x 1 English Instruction Manual x 1