This is a unisex style. While the sizing reflected is men's U.S., women can order 2 sizes down from their regular U.S. shoe size. Check the size chart for more guidance.If you have a low instep and prefer a snug fit, we suggest a half size down. If you have a medium or high instep, order your normal size.Ultra breathable Stitchlite™ knit upper.Luxe cushioning in the outsole, footbed, and sockliner.Springy arched outsole absorbs shock.Smart materials mimic the foot's natural flexibility.