These are lightweight, quick-drying waraji-style zori (Japanese sandals) made from new wool kimono fabric, woven around a nylon core. Although they are made of wool, they are not particularly warm. They are thick and durable, so we recommend them. The size is suitable for approximately 24-24.5cm. To wash, hand wash and put in a net for spin-drying, or use the delicate cycle in a washing machine with a net. Please wash separately as there is a risk of color bleeding. If the thong becomes loose or tight after wearing for a while, please untie and retie the thong on the underside. These are handmade items, so they are not perfect. Please understand this before purchasing. Please refrain from purchasing if you have a dog allergy.