These are lightweight, quick-drying waraji-style zori (Japanese sandals) made from wool kimono fabric, with a nylon core. They are made from recycled kimono fabric, but are new as zori. Size L, recommended for those with feet 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, also in a net. Wash separately as there is a risk of color bleeding. If the thong becomes loose or tight after wearing for a while, try untying and retying the thong on the underside. Please understand that these are handmade and not perfect. Please refrain from purchasing if you have a dog allergy.