The R4B cycling shoes deliver you incredible levels of comfort thanks to the ease of getting the right fit.The Volume Control Technology and Extended Power Strap system allows for quick and easy adjustment, letting youget the perfect fit for your pedalling comfort and power-pushing performance. Once you are happy with the position of the lower straps, use the IP1 Boa to customize the fit quickly and precisely- it's easy to adjust on-the-gotoo, great for last-minute adjustments for that big moment in a race. The Microtexupper is lighter and more durable than leather and with plentiful micro-perforations, you'll enjoy cool feet when hot summer sunshine shows up. It's easy to clean too.Keeping your shoes looking fresh for your racing and training is a cinch - and we think clean shoes let your competitors know you mean business. BOA IP1 Dial Adjustment. The Boa IP1 dial system gives you precise fine-tuned adjustment at the tips of your fingertips. A simple twist of the dial provides a smooth and even closure across the upper and once dialled in, the fit stays in place. Theaircraft-grade stainless steel BOA laces are also strong, stronger per gram than tank armour, in fact, giving you confidence in their long-term durability. And it's all very lightweight too, keeping the overall weight of the R4Bs down to a mere 254 grams (size 43.5). Twist. Fit. Pedal. Cleat Guidance These Road Shoes are compatible with road bike pedal systems that use cleats with 3-bolt standards, such as: Look Delta and Keo, Shimano SPD-SL, Speedplay Light Action, Zero, X-Series (via 3-hole adapter plate), Campagnolo Pro-Fit, Mavic Zxellium, Time Iclic/Xpresso and Time Impact.