The Rivotra comes with Naot's removable, anatomic cork & latex footbed for all day comfort. The Aura Collection features a 1.5" polyurethane sole with a metal shank which is extremely lightweight, durable & abrasive to prevent slipping. This collection uses a hand-sewn Strobel construction making it strong and extremely flexible. 3.5" Shaft Height. 8.5" Shaft Circumference. Please note that measurements may vary by size. Fit - ?True To Size, Half Sizes Size Up. Sole Material - ?Polyurethane. Heel Height - ?1.5. Width - ?Medium. Slip Resistant - ?Yes. Orthotic Friendly - ?Yes. Removable Footbed - ?Yes.