It’s not the cheapest, but with that complex laminate shell, a carefully designed visor and sun visor system and features like the EQRS and anti-fog visor insert (not a Pinlock), it offers lots of features and technology for the money. FYI, I'm going back and forth between RPHA 70 ST and the Bell Star MIPS. This is a multi-layer design made from fiberglass, carbon fiber, carbon fiber hybrid and aramid layers, intended to create a durable yet lightweight shell. Front view of the RPHA 70 Octar yellow/black. RPHA is HJC’s premium line, so you’re getting the best the brand has to offer with the 70 ST. From a material standpoint, this means a PIM+ (Premium Integrated Matrix) exterior shell. The HJC RPHA 70 is a well thought-out and carefully designed helmet. The RPHA 70 Carbon is exceptionally compact and lightweight as a result of the Carbon Fiber Outer shell that provides enhanced shock-resistance with reinforcement material that include Carbon and Carbon-glass hybrid fabric. HJC makes a lot of helmets–more than one million per year in four factories in South Korea and Vietnam, according to the company website. The HJC RPHA 70 is a mid of the range, sport touring helmet which under promises and over delivers in all the good ways. It is an improved version of the HJC RPHA ST and it comes in at $400 USD RRP for a standard colour. Size Cheek Liner; XS 54-55cm 45mm 12mm; S 55-56cm 40mm 9mm; M 57-58cm 35mm 12mm; L 58-59cm 30mm 9mm; XL 60-61cm 30mm 12mm; 2XL 62 … SPECIFICATIONS. And it looks pretty cool too! The HJC seems to be solidly built with all the best materials and creature comforts (I really want the drop down visor), but the STAR seems to be on the cutting edge of safety with the MIPS insert. Sizing . At the upper end of its product range is the RPHA lineup (Revolutionary Performance Helmet Advanced, pronounced “are-fah”), which includes two sport-touring helmets and two street/racing helmets. This HJC RPHA 70 full face motorbike helmet has the following ratings and features: SHARP 3 Star safety rated; EQRS (emergency quick release) cheek pads; ACU gold sticker for track riding; Double-d-ring fasteners strap; Of course, impact resistance is only one part of the safety equation when it comes to an effective crash helmet. The sunshield dropped down and retracted quickly when activated via the switch at the bottom of the left chinbar. The HJC RPHA 70 is also relatively quiet at high speeds even without earplugs, which meant that I didn’t have to turn up my Bluetooth communicator’s volume to full blast, and it’s definitely a pleasant experience with earplugs in. The RPHA 70 ST is HJC’s newest sport-touring lid.