Transparent collar upper do not scar the foot or create any rash over skin, also elastic laces at back adjust according to foot size. Misconception that wedges are heavy, so, for those ladies the PU sole which comes in this design is lightest of industry. Industrial purpose PU adhesive is used to fix the upper with the sole and the bottom is cushioned with an EVA sheet that acts as a soft and anti-sweat layer between foot and sole.