The first full insole for your favorite flip flops, thong sandals and shoes. Piggy Pillows are made with a special anti microbial fabric that has silver woven into its threads for long lasting protection. They are designed to keep your feet stylish, comfy, and dry. One Size Fits Most (women's 5 1/2-9 1/2) Delivery is within 3-4 business days using USPS unless other method is specified by customer.