By the time you enter the bike leg of a triathlon, you're already living in the pain cave. The Sidi T3 Air Shoes allow you to focus on riding efficiently, without slowing you down or subjecting you to more pain. Its effortless hook and loop straps help you transition through T1 without messing with time consuming dials or buckle systems. You'll also find a convenient heel pull tab, which helps you pull these shoes on in a hurry. Enhancing efficiency without the torturous rigidity of full blown carbon race soles, Sidi's Eleven Carbon Composite sole is made of a carbon infused nylon matrix. This provides the variable stiffness needed for maximum efficiency and comfort, as well as enhancing durability for multiple seasons of high performance use. Sidi's Lucido synthetic leather upper wraps your foot for a precise fit without wrinkling or becoming distorted from wearing 'em tight over time. Taking cue from its Air namesake, the synthetic leather upper is highly perforated for excellent breathability when you're training and racing on the hottest summer days. Moreover, you'll find Sidi's signature Heel Cup, which prevents slippage when you're climbing and sprinting out of the saddle.