The Just1 J39 Solid Black Matt is a premium adventure-style motorcycle helmet built for riders who demand both protection and practicality. Constructed from a high-quality thermoplastic resin external shell, available in two shell sizes with matched dual-density EPS, the J39 delivers a precise, performance-focused fit across the full adult size range from XS to XL. Its clean, blacked-out matt finish gives it an understated, aggressive aesthetic that pairs effortlessly with any riding style. Safety is at the core of the J39's design. Dual-certified to both ECE 22.06 and DOT standards, the most stringent international benchmarks, it features Just1's proprietary J.L.E.R. (Just1 Liner Emergency Removal) System, allowing emergency responders to safely remove cheek pads without disturbing the rider's head or neck. The interior is treated with PROTX™ Antimicrobial Technology, actively inhibiting bacteria and odour build-up to keep the helmet fresh ride after ride. Versatility is built in from the start. The J39 ships with a standard peak system secured by screws for a rattle-free fit on and off road, and includes a helmet bag and peak extension in the box, everything you need to ride from day one. Whether you're commuting through the city or carving up country lanes, the J39 is the helmet that works as hard as you do. FEATURES KEY FEATURES Dual-certified: ECE 22.06 and DOT approved High-quality thermoplastic resin external shell in 2 shell sizes 2-size EPS inner shell for optimised impact absorption and fit J.L.E.R. System: emergency cheek pad removal for first responders PROTX™ Antimicrobial Technology lining treatment Standard peak with screw-fixed system for secure attachment Includes: helmet bag and peak extension SIZE GUIDE Adult Size Guide SIZE CM IN XS 53-54 20 7/8 - 21 1/4 S 55-56 21 5/8 - 22 M 57-58 22 1/8 - 23 1/8 L 58-60 23 1/4 - 23 5/8 XL 61-62 24 - 24 3/8 XXL 63 24 3/4
