Fantastically ventilated with 31 inlets, and completely aerodynamic with its removable aero cells, The One is also perfectly designed to hold your sunglasses in its Sunglasses Garage if you remove them during the race. With a focus on safety, the One features a specially designed Bollé Led. Its Click-to-fit System ensures a perfect adjustable fits and its interchangeable winter and summer linings allow for all year or d use. Complete with a detachable visor for mountain biking, The One offers you everything you need in a cycling helmet.Features:Removable Aero Shells:- Our removable aero shells allow you to adjust helmet ventilation and aerodynamics. Completely ventilated with 31 partially or wholly covered inlets, you now have a real choice. Opti-Dock:- The One helmet has a specific compartment designed to hold a pair of sunglasses. Removable visor:- For those who prefer the road but, from time to time, head off the beaten track, The One helmet is also delivered with a removable mountain bike visor. You can use the same helmet on and off-road. Click-to-fit™ System:- The Click-to-Fit™ System allows precise adjustment. On the road, you will be able to adjust helmet size and pressure to your head for perfect stability, fit and comfort.Safety led:- The LED was especially designed for a perfect fit with BOLLÉ helmets. Located at the highest point of the cyclist's silhouette, the LED has 2 positions, either continuous or flashing, and offers best possible visibility and, as a result, added safety. If you're racing and the slightest gram saved is important, fear not, BOLLÉ has designed a lighter capsule to replace the LED without detracting from its great looks.All seasons:- Our helmets are equipped with 2 linings, one for summer and high temperatures and the second for the cold in winter. The winter lining replaces the summer lining and is directly velcroed onto the helmet. The helmet straps then slide through loops sewn into the winter lining. Gone are the days of slippery bonnets and exposed ears after just a few kilometres! These 2 linings allow you to ride in under perfect conditions all year round.