Fizik's K1 Donna is your secret time bonus, shaving precious seconds off your transition, and setting you up for a personal best at your next tri. Handmade in Italy, the uppers feature a breathable neoprene booty, fast-drying nylon mesh, and moldable 3D Flex insoles for superb comfort on the bike leg. The carbon outsole is light, stiff, and highly sculpted, resulting high-wattage power transfer. You won't waste any time in the transitions thanks to the large heel loop as well as the large Velcro straps that offer easy, on-the-bike entry and fit adjustments.
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