Imagine the pure elation as the tape breaks across your chest. Now make it happen. Slip on the Zoot Ultra TT 5.0 racing flat and claim your win! ; Update to the Ultra TT 4.0 (no longer available) . A neutral racing flat specifically designed for the triathlete. Breathable textile upper with lightweight synthetic overlays. Barefit seamless technology promotes an exceptional next-to-skin feel. Designed to be worn sockless. Quick-Lace system allows for fast transitions. Tongue loop and heel tab for an easy on and off. Z-BOUND midsole delivers exceptional energy return, reducing stress and fatigue. Carbon Span+ helps guide the foot, promoting a powerful toe-off. Midsole Heel/Toe Height: 25 mm./ 13 mm. Midsole Differential: 12 mm. Durable rubber outsole supplies lightweight cushioning and grip. Measurements: ; Weight: 10 oz ; Product measurements were taken using size 11.5, width D - Medium. Please note that measurements may vary by size.