Kobayashi Pharmaceutical Netsusama Hiyari Gel Mat 70cm x 90cm Box has creases. The heat increases every year, doesn't it? How about this for heat対策? ・Comfortable sleep support ・No refrigeration needed ・Can be used when sleeping or relaxing ・Usable on both sides Retail price: 4,000 yen Only the mat will be sent. Please understand (the box is not included). ●Please consider this item, understanding that it is stored at home and is a used item. Shipped in an unpadded envelope.