Louis Garneau X Lite Bicycle Helmet. Louis Garneau has created a masterpiece of design, performance comfort in their X Lite Bicycle Helmet not only Louis Garneau's lightest Bicycle Helmet, but the lightest Bicycle Helmet on the market at 195 grams. Through patent pending U Bar technology, U shaped ribs that are folded six times create a complex exoskeleton in the shell to reinforce the Bicycle Helmet's structure while Super MSB technology along the perimeter further enhances the Bicycle Helmet's strength. Ventilation is superb via 37 vents and the ultra lightweight SpiderLock SL retention system can be fully adjusted using only a single hand. Ergonomic, durable, and washable Airdry padding ensures all day comfort and the ultra light cam locks make dialing in the strap position a simple endeavor.