Lightest in its class weighing it at 224grams / foot. A single ATOP micro-dial places 6 points of contact along the top ridge of your foot. It's secure yet supple and provides even tension all the way up. Ratchet it up until its just right - takes less than 2 seconds to shoe up in the morning. Ultra supple laser perforated synthetic uppers fit and mold to your feet like a glove. A full carbon sole is stiffer than anything you have ever tried and with a total stack height of 4mm means you feel connected to the bike, be it sprinting or climbing.