While these flip flops are called thongs, as that is what they are called in Australia. These are proving to be very popular in Australia with many podiatry clinics stocking them for their patients to buy. While they are not necessarily an alternative to foot orthotics, they are proving to be quite useful as an adjunct to foot orthotic therapy, especially if the range of footwear is limited. You can learn more about them here and purchase them here. Most people that physically try on a pair of these end up buying them as they find that they are so comfortable.