Gently used shoe insert, orthotic. Size 37 Regular, and I wear an 8-8.5 size shoe. Some wear shown on blue silk cover, but not used a lot so definitely have a lot of use left. Comes with original box, retails for $65 with tax. The Blue Footbed utilizes the principle of walking barefoot. It is based on the impression left by a healthy foot in sand, creating a natural environment for your feet. The heel area is cushioned and stabilized thanks to the raised design. This also supports the natural arch of the foot. The Blue Footbed is therefore ideal for anyone who would like to enjoy the unique comfort of BIRKENSTOCK in enclosed shoes made by other brands too. Anatomical footbed shape Excellent heel stabilization Optimum damping For modern business, leisure, and sports shoes without a heel