The Bell Super Air R Mips MTB Full Face Helmet was designed from the ground up to push the boundaries of performance and versatility. As pioneers of removable chin bar technology, Bell have a legacy to uphold and overcome. The Bell Super Air R Mips MTB Full Face Helmet was designed from the ground up to push the boundaries of performance and versatility.   With class-leading Flex Spherical MIPS technology, superior ventilation, a total weight that is 22% or 144g lighter than its predecessor and an easy 2-click removable chin bar, this is a true all-mountain performer. Bell Super Air R Mips MTB Full Face Helmet Features Wraparound Chin Bar GoggleGuide™ Adjustable Visor Integrated Breakaway Camera Mount Sweat Guide™ X-Static® Padding FLEX Spherical + MIPS® Bell Super Air R Mips MTB Full Face Helmet Specifications Certifications: CPSC Bicycle, CE EN1078 Vents: 18 helmet vents, 8 chin bar vents, 4 brow ports Ventilation: Overbrow Ventilation™ Construction: Fusion In-Mold Polycarbonate Shell, Progressive Layering Fit System:  Float Fit™ Weight: 640g (size M) Sizes: Small 52–56 cm, Medium 55–59 cm, Large 58–62 cm.