{"product_id":"rpha31-dereen-mc21","title":"RPHA31 Dereen MC21","description":"\u003ch2 dir=\"ltr\"\u003eHJC RPHA 31 – Premium P.I.M.™ open-face helmet, visor deflector and anti-opening lock\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe HJC RPHA 31 is the premium open-face helmet in the RPHA series, designed to reduce noise and drag thanks to a dedicated visor deflector and a locking system that secures the visor against accidental opening. With its P.I.M.™ shell, DMS sun visor and SMART HJC compatibility, it is designed for discerning urban riders.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eHJC RPHA 31 open-face helmet: the premium model designed for silence\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eA high-performance open-face helmet must limit wind noise without compromising lightness. The HJC RPHA 31 was designed with this in mind, featuring a P.I.M.™ – Premium Integrated Matrix shell, a high-performance material made of fibrous fabrics infused with epoxy resin, available in four shell sizes. Its aerodynamic design improves airflow penetration, while an air bypass channel through the ventilation reduces drag and wind noise.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe HJ-39 Pinlock-ready visor – with a 120XLT lens included in the box – filters 99% of UV rays and features a scratch-resistant, anti-fog coating. The visor mounting kit provides smooth movement and improved sealing, while a dedicated visor deflector reduces noise levels and blocks incoming wind. A locking system completes the setup, further reducing noise and air drag while securing the visor to prevent accidental opening.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe extended shell and chin EPS provide a full-face fit, offering a more enveloping hold than a standard open-face helmet. The helmet also features a 3-position adjustable DMS sun visor, full front-to-back ventilation with 2 air inlets and 4 air outlets, and is compatible with the SMART HJC 11B, 21B and 50B 2nd Generation Bluetooth systems, sold separately.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eKey features of the HJC RPHA 31\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\n\u003cli\u003eP.I.M.™ – Premium Integrated Matrix shell: four shell sizes, aerodynamic design.\u003c\/li\u003e\n\n\u003cli\u003eAir bypass channel: reduces air drag and wind noise.\u003c\/li\u003e\n\n\u003cli\u003eHJ-39 visor: Pinlock-ready (120XLT lens included), scratch-resistant and anti-fog coating.\u003c\/li\u003e\n\n\u003cli\u003eDedicated visor deflector: reduces noise and blocks incoming wind.\u003c\/li\u003e\n\n\u003cli\u003eVisor lock: secures against accidental opening, reduces noise and drag.\u003c\/li\u003e\n\n\u003cli\u003eExtended shell and chin EPS: full-face fit.\u003c\/li\u003e\n\n\u003cli\u003e3-position adjustable DMS sun visor.\u003c\/li\u003e\n\n\u003cli\u003eFull front-to-back ventilation: 2 air inlets and 4 air outlets.\u003c\/li\u003e\n\n\u003cli\u003eCompatible with SMART HJC 11B, 21B and 50B 2nd Generation Bluetooth (sold separately).\u003c\/li\u003e\n\n\u003cli\u003e5-year warranty.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\n\u003cli\u003eHelmet type: premium open-face\u003c\/li\u003e\n\n\u003cli\u003eShell material: P.I.M.™ – Premium Integrated Matrix, fibrous fabrics infused with epoxy resin\u003c\/li\u003e\n\n\u003cli\u003eNumber of shell sizes: 4\u003c\/li\u003e\n\n\u003cli\u003eMain visor: HJ-39, scratch-resistant and anti-fog coating, 99% UV protection\u003c\/li\u003e\n\n\u003cli\u003ePinlock: 120XLT lens included in the box\u003c\/li\u003e\n\n\u003cli\u003eVisor mounting kit: smooth movement, improved sealing\u003c\/li\u003e\n\n\u003cli\u003eVisor deflector: noise reduction, blocks incoming wind\u003c\/li\u003e\n\n\u003cli\u003eVisor lock: secures against accidental opening\u003c\/li\u003e\n\n\u003cli\u003eSun visor: DMS – Dynamic Multi-Step Sunshield, adjustable to 3 positions\u003c\/li\u003e\n\n\u003cli\u003eVentilation: full front-to-back, 2 air inlets and 4 air outlets\u003c\/li\u003e\n\n\u003cli\u003eFit: extended shell and chin EPS for full-face support\u003c\/li\u003e\n\n\u003cli\u003eInterior: antibacterial fabric that promotes moisture release and quick drying\u003c\/li\u003e\n\n\u003cli\u003ePads: removable, washable cheek pads that are interchangeable across all sizes\u003c\/li\u003e\n\n\u003cli\u003eClosure: one-touch buckle\u003c\/li\u003e\n\n\u003cli\u003eGlasses channel\u003c\/li\u003e\n\n\u003cli\u003eIntercom: compatible with SMART HJC 11B, 21B and 50B 2nd Generation Bluetooth, sold separately\u003c\/li\u003e\n\n\u003cli\u003eIncluded in the box: Pinlock 120XLT lens\u003c\/li\u003e\n\n\u003cli\u003eSizes: up to 2XL\u003c\/li\u003e\n\n\u003cli\u003eWeight: approximately 1,350 to 1,450 g depending on size and measurement sources; weight may vary depending on helmet size, to be checked on the official technical sheet\u003c\/li\u003e\n\n\u003cli\u003eApproval: ECE 22.06\u003c\/li\u003e\n\n\u003cli\u003eWarranty: 5 years\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eWhy choose the HJC RPHA 31?\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe RPHA 31 stands out for its specific focus on noise and aerodynamics, which is rare for an open-face helmet: an air bypass channel, a dedicated visor deflector and an anti-opening locking system all work together to limit the noise typically associated with this type of helmet.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eIts extended shell and chin EPS provide a more comprehensive fit than a standard open-face helmet, approaching the support of a full-face helmet while retaining the benefits of an open-face. The 5-year warranty confirms the helmet's premium positioning within the RPHA collection.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eComfort and ventilation\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThe RPHA 31's full front-to-back ventilation, with 2 air inlets and 4 air outlets, ensures efficient airflow for everyday use. The removable and washable antibacterial interior completes this approach, with cheek pads that are interchangeable across all sizes to refine the fit.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eVisor deflector and lock\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThe dedicated visor deflector blocks incoming wind while reducing perceived noise levels, a valuable feature on motorways or at sustained speeds. The locking system reinforces this approach by securing the visor against accidental opening, while also helping to reduce noise and air drag.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eHJ-39 visor and DMS sun visor\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThe HJ-39 visor features a scratch-resistant, anti-fog coating, Pinlock readiness and a lens included in the box. The 3-position adjustable DMS sun visor allows you to adapt precisely to changes in brightness while riding.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eCare instructions\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eClean the HJC RPHA 31 visor with lukewarm water and a soft microfiber cloth, avoiding any harsh household products that could damage the scratch-resistant and anti-fog coating.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAs the top cover and cheek pads are removable, wash them regularly by hand with mild soap, then leave them to air dry away from any direct heat source.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003ePeriodically check that the deflector and visor locking system are working correctly to ensure the helmet remains reliable and quiet over time.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eFrequently asked questions about the HJC RPHA 31\u003c\/h3\u003e\n\u003ch4 dir=\"ltr\"\u003eIs the HJC RPHA 31 ECE 22.06 approved?\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eYes. The HJC RPHA 31 meets the ECE 22.06 European standard, which includes tests on impact absorption and the strength of the helmet's various components.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eHow does the HJC RPHA 31 reduce wind noise?\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eThe helmet combines several features designed for this purpose: an air bypass channel through the ventilation, a visor deflector that blocks incoming wind, and a visor locking system that further reduces noise and drag.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eIs a Pinlock supplied with the HJC RPHA 31?\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eYes. The Pinlock 120XLT lens is included in the box, ready to be installed on the Pinlock-ready HJ-39 visor.\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003eCan an intercom be installed on the HJC RPHA 31?\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003eYes. The helmet is compatible with the SMART HJC 11B, 21B and 50B 2nd Generation Bluetooth systems, sold separately.\u003c\/p\u003e","brand":"HJC","offers":[{"title":"XS","offer_id":54469392433499,"sku":"253562-6-15","price":467.65,"currency_code":"GBP","in_stock":false},{"title":"S","offer_id":54469392466267,"sku":"253562-6-16","price":467.65,"currency_code":"GBP","in_stock":false},{"title":"M","offer_id":54469392499035,"sku":"253562-6-17","price":467.65,"currency_code":"GBP","in_stock":false},{"title":"L","offer_id":54469392531803,"sku":"253562-6-18","price":467.65,"currency_code":"GBP","in_stock":false},{"title":"XL","offer_id":54469392564571,"sku":"253562-6-19","price":467.65,"currency_code":"GBP","in_stock":false},{"title":"XXL","offer_id":54469392597339,"sku":"253562-6-20","price":467.65,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/icasque.com\/en-uk\/products\/rpha31-dereen-mc21","provider":"iCasque","version":"1.0","type":"link"}