Giro Tremor Child bike helmet adjustable fit 18 vents good ventilation Matte Black, size: UC

HARDSHELL WITH IN-MOLD HARDBODY LOWER WRAP - The two-piece shell combines a tough outer hard shell with a polycarbonate lower shell permanently fused to the liner for durability without excess weight ROC LOC SPORT FIT SYSTEM - The Roc Loc Sport fit system offers easy one-handed operation with a 7cm adjustment range; its confident clicking feel and sound lets riders know that the helmet is adjusting to a comfortable fit; with comfort similar Roc Loc 5 and ponytail compatibility, the new Roc Loc Sport fit system brings premium function to sport level helmets UNIVERSAL FIT SIZING - Our Universal Fit helmets are sculpted to look good and fit great for almost anyone on the first try; by developing proprietary shell sizes based on specific customer groups, and combining them with an easily-adjustable fit system, it's easy for you get the right fit, straight out of the box, without the hassle or expense of trying multiple sizes