The Giro Register MIPS II LED Helmet is a well-rounded, multi discipline helmet with a removable visor, polycarbonate construction, MIPS Evolve Core Technology and a 4-lumen rear light and reflective rear decals for increased visibility. The Roc Loc Sport MIPS retention system lets you get a custom fit with the turn of a dial. There are 19 vents and deep internal channeling to keep you cool. SPECIFICATIONS: Polycarbonate construction MIPS Evolve Core Technology Rear Light Batteries Included: CR2032 4 lumen rear light Roc Loc Sport MIPS Adjustment System Reflective rear decals 19 vents and deep internal channeling Quick Link removable visor