Profila Dry yarns with Olefin provide excellent stretch and moisture transfer. Arch compression for a stay-put fit. Strategically-placed cushioning at achilles and instep reduces pedaling pressure. Strategically-placed ventilation on top and bottom provides great breathability. Flat toe seam for toe box comfort. Knit-in size callouts for easy sorting after the wash. Taller 5"" (13cm) cuff.