Fit should not be a guess. The Sydney is a full-grain leather wedge sandal, with a pressure-easing arch contour. For anyone who wants a fit measured to them. The Sydney is shaped by real foot scans, not by guesswork. Aetrex Signature Contour: eases pressure zones across the foot Engineered fit: a fit engineered from millions of real foot scans, so the shape comes from real foot data, not an average Supple full-grain leather, lined with a plush, soft-touch lining. Underfoot, a rubber outsole built for traction and the long haul.A fit shaped by data, not guesswork. FIT Fits true to size. Sizes 36-43, in Medium width. Heel height approx. 76mm; heel-to-toe pitch approx. 45 mm. CARE Leather: wipe with a soft damp cloth; condition occasionally; avoid soaking and direct heat.