WaveCel advanced helmet technology;The Boa® Fit System lets you easily secure and adjust helmet fit with just one hand;Easy-to-use adjustable strap dividers allow for a fine tune fit;An aerodynamic shape helps you outsmart the wind and ride faster;Additional NoSweat pad with silicone channel keeps sweat out of eyes for constant clarity;The Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership;