Diadora has learned to walk a fine line between comfort, efficiency, and weight in its cycling shoes. For the Speed Vortex Cycling Shoes, the Italian manufacturer opts for a slightly heavier sole by 10 grams per pair that incorporates the same NET breathing technology found in the line topping Vortex Pro. The soles are constructed of a synthetic mesh and breathable, impermeable membrane that increase the soles' transpiration capacity without letting moisture, mud, and other external elements in. The Speed Vortex Shoes also feature the Vortex Pro's Suprell Tech Morpho AM Cage technology. The shoes stay tight against your feet without restricting circulation. Inside the upper, the EVA insert is perforated to further promote breathability and removable, so you can optimize your level of arch support to your own foot shape. The molded, abrasion resistant Duratech heel cup is updated with a griping texture to keep your foot from slipping, but is also removable if your feet demand it. The closure system incorporates a Boa wire system almost mandatory for quality cycling shoes today and a hook and loop strap. The Boa wire lets you fine tune the fit across the top of your foot, where the most pressure is applied to the upper, and the hook and loop strap lets you modulate the pressure over your metatarsal area. Anyone who's experienced crippling hot spots in the toe box will appreciate this variable approach, as it lets you customize the shoe's fit for firm support and spacious comfort at the same time.