TheBontrager Solstice Mips Helmetincludes a sleek built-in brim with plug ports for a clean look when the additional visor is removed. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientists to help reduce rotational forces on the brain caused by angled impacts to the head.Bontrager Solstice Mips Helmet FeaturesMIPS Brain Protection SystemFidlock magnetic buckle fastens effortlessly for a quick, secure fitThe intuitive, one-handed Headmaster fit system adjusts height and circumferenceBuilt-in and removable visor options give you two choices for constant coverageLockDown dividers make helmet strap management clean and easy to adjustInternal, recessed channels move airflow over your head to keep you cool and drySoft, comfortable, moisture-wicking and washable helmet pads for added comfortBontrager Solstice Mips Helmet SpecificationsFit System: Headmaster IIPad Material: Moisture wicking padsBuckle Type: Fidlock buckleIncludes: Crash Replacement GuaranteeWeight: 315g - 345gSizes: Small/Medium (51-58 cm), Medium/Large (55-61 cm)