These are Keen's classic sandals. I am selling them because I bought another pair. Size: 27 cm I think they are in relatively good condition. The following is quoted from the official website: UNEEK is an Open Air Sneaker. A next-generation sneaker made from two cords and a sole. After rethinking the method of shoemaking from scratch, and after three and a half years of planning, this revolutionary and unique hybrid footwear was completed. With Socks: By changing the combination from thin socks to fleece socks, it can be used for three seasons.