Fantastically ventilated with 31 inlet holes, The ONE® is perfectly designed to keep your sunglasses in the "glasses garage" if you want to take them off during the race. With a focus on safety, The ONE® offers a Bollé security system based on a QR Code and a signaling system with LEDs on the back. Its click-to-Fit ™ system ensures a perfect adjustable fit, and its interchangeable winter and summer linings allow year-round use. The ONE® gives you everything you need in a cycling helmet. Compared to The One Road Premium, The One Road Standard does not have top removable covers. Sunglasses glasses garage. Signaling system with LEDs on the back. Click-to-Fit ™ system. Holes: 31.