Pearl's Tri Fly IIIs deliver top-notch comfort and efficiency for general riding and for racing triathlons. For top comfort even if you ride without socks, they feature light, breathable, lined mesh uppers that conform to your feet. Plus, there are vented nylon soles that provide excellent pedaling efficiency and keep you dry and comfortable. The lined heels hold your feet securely in place, too. You'll also love the heel straps, which help speed your transitions and the quick strap closures.