1. Heat or Cold therapy - Heat and cold therapy can help with neck, shoulder and back pain. Heat therapy provides depth of comfort throughout the target area, relieving tension, stress and pain. Simply heat a hot, damp heating pad in the microwave to allow for the heat treatment. The cold treatment restricts the blood vessels to the muscles and surrounding tissues, thereby reducing swelling. Cool the neck and shoulder wrap of the microwave oven in the freezer for cold treatment. 3. Easy to use anytime, anywhere. This neck warmer or cooler provides greater comfort when working at a desk, sitting on a couch, preparing a meal, or even driving a car. Heating precautions: Microwave for 1 minute, then remove and shake evenly, turn over and reheat for another 30 seconds. Total heating time should not exceed 2 minutes. Precautions for refrigeration: Refrigerate for 1 to 2 hoursProduct name: Cold and hot compress for shoulder and neck Product Model: NY-HJ300 Product material: absorbent beads, plush cloth Product size: 28*16cm Package size: 18.5x13x5cm, 320g Packing: PET box Packing specification: 35*28*28cm/16kg/20 PCS Packing list: Cold and hot compress shawl *1, English instruction manual *1 Usage: Refrigerate, microwave oven heat2. Contoured and in place - With a high collar, extra wide shoulders, extra long chest cover and rear design, this neck heating pad fits your neck and shoulders for complete comfort. Because the weight of the filler is evenly distributed, the weighted heating neck wrap maintains balance and keeps the neck and shoulders stable, so the upgraded design is generally suitable for most body types.