Endura Green Hummvee Plus Mtb Helmet in Size XL Boys, Sports Direct. The Hummvee Plus Helmet embodies Endura’s “Ride It All” design philosophy—engineered to perform whether you’re tackling rugged trails, navigating busy city streets, or exploring everything in between. With large, strategically positioned vents, it delivers exceptional airflow for maximum breathability and comfort on every ride. Key Features Lightweight in-mould construction Removable, adjustable visor offering a wide range of movement. Large vents keep your head cool in all conditions One-handed micro adjust fit system with multiple anchor points for wide range of adjustment Fast wicking, quick dry, soft touch, removable padding Certified to CPSC and CE EN1078:2012 + A1:2012 Standards Endura Helmet Sizing S/M M/L L/XL Head Circumference (cm) 51 - 56 55 - 59 58 - 63 Head Circumference (in) 20 - 22 21.5 - 23.25 22.75 - 24.75Looking for alternatives to stores like JD Sports, eBay, SHEIN, ASOS, Next, Best Choice UK, Very, Decathlon UK, Argos, schuh, Temu, BuyBetter, or Nike Official? Discover our unique selection.