Warm Neck and Shoulders Heat Belt Only - Pink Gel pack contents not included. The belt shape allows it to be wrapped around the lower back, knees, etc. The heat-retaining brushed cover allows the gel pack to be heated in the microwave while still inside. The cover is removable and washable, allowing for repeated use, making it economical!! 【Material】 Cover (1 piece)・・・Polyester I recently purchased this, but I can still use my previous cover, so I'm selling this one. I may have used it once or twice. Please understand this before purchasing.