Used about 3 times. Product Information This foot warmer uses Exceloft®, which is easy to care for and has high heat retention. It is a suitable item for cold protection in mountain huts, tents, during rest, and when sleeping. The lining uses a brushed mesh fabric that is non-slip, making it difficult to come off during sleep or walking. The fit around the ankles can be adjusted with a drawcord. The stretch material at the opening prevents cold air from entering. Specifications 【Material】Outer fabric: 40-denier nylon taffeta Lining: Climaplus® mesh [polyester] Insulation: Exceloft® [polyester] 【Average weight】233g 【Colors】Black (BK), Red (RD) 【Sizes】S (22 - 24cm), M (24 - 26cm), L (26 - 28cm) (Unisex) 【Storage size】Φ12 x 19cm 【Features】Includes stuff sack