Outdoor Research tent shoes. Color: Black, Size: M. They cost 9680 yen. I bought them but have kept them new and unused. Please refrain from purchasing if you are sensitive to items stored at home. Manufacturer's Description: The OUTDOOR RESEARCH Tundra Aerogel Socks are slip-on socks equipped with NASA-approved warm Aerogel. The micro-suede sole is durable enough to walk around the cabin, and keeps your feet warm even when worn inside a sleeping bag. ● Features: Insulated / Ankle cinch top / Anti-slip sole ● Materials: Shell fabric / 100% polyester; Insulation / PrimaLoft Gold Insulation with Cross Core Technology 133g/m2 (100% polyester); Micro-suede sole (100% polyester); Lining / Tricot ● Weight: 155g (size L pair) ● Sizes: S = 23-24.5cm, M = 25-26.5cm, L = 27-28.5cm ● Color: Black