CONSTRUCTION - Mips - Multi-Directional Impact Protection System. Hard Shell construction produces great helmets at great value. A rugged outer shell is formed and then attached to the EPS foam liner. FIT SYSTEM - In Form Fit System makes it easy to dial in a custom fit in seconds - even with gloves on. An ergo-friendly dial at the base of the helmet provides up to 6cm of adjustment and enhanced stability. Vertical Tuning feature accommodates different goggles and head shapes for a custom fit free of gaper gap (space between goggles and helmet). VENTILATION - Stack Vent in the front of the helmet which aligns with your goggles and helps to keep them clear and fog free. The Super Cool Vents on the top of the helmet allows the hot air to escape. SEAMLESS COMPATIBILITY WITH ALL GIRO EXV GOGGLES - Giro products have been meticulously designed and tested to work together. We've fine-tuned the pairings of our helmets and goggles using exhaustive testing in our Dome R&D center and translating those findings into the perfect Seamless Compatibility fit. We recommend Giro Axis, Ella, and Blok Goggles. FEATURES - Mips. Compatible with aftermarket audio systems. Removable ear pads. Removable goggle retainer. Vertical Tuning. Compatible with aftermarket audio systems.