polyester SIZING: Available in size Small (US 6 -7), Medium (US 7 8), Large (US 8-9). Slipper is narrow in width, if you have wide feet we recommend buying a size up. MEMORY FOAM: thick memory foam cushion add support and comfort for all day wear ANTI SLIP SOLE: The textured bottom grips to the floor preventing you from sliding or slipping. STYLE: Thong slip on style made of soft, cozy and plush off white material. Thick cloud-like cushion provides ultimate comfort. CARE: Hand wash with cold water. Air dry and dry flat.