To use these Vionic Bella II sandals, simply slip your feet in. They're great for summer outings and will keep your feet comfortable. In the first couple of days, wear them for just a few hours at a time so your feet can get used to the special orthotic. They're available in women's sizes 5 - 11, and if you're a half - size, go down a size. As for maintenance, use a wet towel to clean them. Avoid using outside cleaning supplies as it may damage the sandals. Enjoy these stylish and supportive sandals all summer long.