RX Bearings Steel MGP-710 Green jones light weight materials that provide

light weight materials that provide high energy return and don't break down

so you can dial in the exact edge you need

You can see this very well when you look at a TSG helmet from the front: The sides of the helmet shell have more curvature and go clearly inwards

Top elastic and bottom webbed adjustable straps

RX Bearings Steel MGP-710 Green jones light weight materials that provideRx STEEL MGP 710 GREEN The Rx Steel bearings have 7 steel balls. Material Composition Steel balls are 52100 carbon, chromium steel (HRC 67) Inner and Outer raceways are 52100 carbon, chromium steel (HRC 67) Retainer is 6 6 Nylon + special additive making it more resistant to breakage Pre lubricated with Rx Lube Drops, a low viscosity oil to reduce friction Tolerances ABEC 7 rating, Ball deviation grade 10, Noise is under 31db. Design Features Balls