Shoei RF SR Solid Rachelle bath at home July 1991 YouTube. Equipped with many of SHOEIs top features while keeping functionality efficient and to the point, the all new RF SR is anything but entry level. Boasting a compact, aerodynamic shell design along with sharp and aggressive styling, the RF SR has a progressive look all of its own. Exceptional airflow, an advanced shield system, and a fully removable liner allow the RF SR to excel whether short distance street performance or long distance touring comfort is your jam. The RF SRStreamlined functionality and affordability with premium SHOEI quality. Advanced short distance street performance and long distance touring comfort Compact, aerodynamic shell design with sharp and aggressive styling Optimal shell aerodynamics and liner components reduce unwanted road noise Matte black ventilation components enhance aggressive styling Streamlined function and affordability VENTILATION PERFORMANCE Fine tuned in SHOEIs state of the art wind tunnel to optimize the important balance between airflow and a quiet ride, the RF SR is equipped with three (3) adjustable air intakes and two (2) exhaust outlets to help customize your ventilation in every condition. Large lower vent shutter for ease of use with riding gloves Two upper air vents for optimal air intake Two uniquely positioned upper exhaust vents for improved negative pressure suction Wind tunnel optimized to balance enhanced airflow and silence SHIELD SYSTEM The RF SRs shield system provides a vast field of vision that rivals helmetless peripheral, features innovative ribs to improve rigidity and eliminate bending, and facilitates quicker shield changes than ever before. CWR 1 SHIELD Protects from 99% of the suns damaging UV rays 3D injection molding ensures distortion free view throughout the entire field of vision Innovative new ribs on top and bottom edge improve rigidity and eliminate bending Improved shield locking mechanism Comes equipped with Pinlock EVO fog resistant system QR E BASE PLATE SYSTEM Facilitates quick and smooth shield changes SHOEIs patented spring loaded technology ensures a wind and waterproof seal Strengthened springs for more precise functionality Five stage rotating dial for shield base plate fine tuning SAFETY Few characteristics of a motorcycle helmet are as critical as its first and second layers of defense, which is precisely why the RF SR features the SHOEI exclusive Multi Ply Matrix AIM+ shell and Dual Layer, Multi Density EPS liner. MULTI PLY MATRIX AIM+ SHELL Proprietary technology integrates a six ply matrix Hand laid interwoven layers of fiberglass with organic fibers and resin SHOEIs strongest, lightest, most elastic shell DUAL LAYER MULTI DENSITY EPS LINER Provides enhanced impact absorption by utilizing varying densities of foam Allows cooling air to travel unrestricted through tunnels created in the EPS Precise placement of multi density EPS material yields a more compact, lightweight design EMERGENCY QUICK RELEASE SYSTEM (E. Q. R. S.) Allows emergency medical personnel to easily and safely remove the cheek pads from an injured riders helmet Helmet can be gently removed from an injured riders head with minimal load placed on his her neck COMFORT The RF SR is equipped with a fully removable, washable, adjustable, and replaceable interior system thats been enhanced for a comfortable fit and maximum helmet stabilization during high speed riding. Fully removable, washable, replaceable and adjustable Three dimensionally shaped to match the contours of a riders head Multi layer cheek pads available in multiple sizes for improved comfort and helmet stabilization Cheek pad channel for eyeglasses HELMET SIZE CHART SIZE HAT SIZE CM INCHES X Small 6 5 8 6 3 4 53 54 20 7 8 21 1 4 Small 6 7 8 7 55 56 21 5 8 22 Medium 7 1 8 7 1 4 57 58 22 1 2 22 7 8 Large 7 3 8 7 1 2 59 60 23 1 4 23 5 8 X Large 7 5 8 7 3 4 61 62 24 24 3 8 2X Large 7 7 8 8 63 64 24 3 4 25 1 8 3X Large 8 1 8 8 1 4 65 66 25 5 8 26 HOW TO MEASURE YOUR HEAD SIZE To determine where you fall on SHOEI's sizing chart (as a starting point for proper helmet fit), pass a soft, flexible tape measure horizontally around your head at a height of approximately one inch (2. 5cm) above your eyebrows (the largest measurement around your forehead). Select the helmet size that is closest to your head measurement from the sizing guidelines above. If your head measurement falls between two helmet sizes, first try on the smaller of the two helmets. THE PERFECT FIT No helmet can protect the wearer against all unforeseeable high and low speed impacts. However, to help maximize head protection, the helmet must fit properly, and the retention system must be securely fastened under the chin. Failure to ride with a proper fitting helmet and securely fastened chinstrap is dangerous, as the helmet could come off during an accident, resulting in severe head trauma or death.