These are lightweight, quick-drying waraji-style sandals made by wrapping a nylon core with yukata fabric. Although they use recycled fabric, the sandals themselves are new. Due to the retro fabric, there may be some overlooked stains. They are recommended for those with feet around 23-23.5cm. To wash, hand wash and put in a net for spin-drying, or use a washing machine with a net on the delicate cycle. 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, so they are not perfect. Please understand this before purchasing. Please refrain from purchasing if you have a dog allergy.