Integrated MIPS Brain Protection System Hardshell with in-mold Hardbody lower body Two-piece construction improves durability without adding excess weightEPS foam liner- compresses upon impact to absorb shockWind tunnel ventilationRoc Loc 5 fit system - fine-tune your fit for ultimate comfort and protectionColour: Matte Trail GreenWeight: 316g (medium)Size Guide (head circumference)S 51 - 55 cmM 55 - 59 cmL 59 - 63 cmXL 61 - 65 cmRead our guide to choosing the right helmet style and size, and fitting it correctly._ More info