which is able to respond automatically to changes in light conditions

They are CNC Machined from 2014 T6 aluminium in the Hope factory in Barnoldswick

reliable solid rotor

They also have Nylon and Graphite ball retainers that are virtually frictionless and the bearings are filled with Rheolube - a special synthetic grease formulated in the USA

All with exception UV protection that black 100% of UVA

Bell Sanction Helmet - M - Black Presences - AS-NZS 2063-2008 Standard Images Uploaded - Ready for Review which is able to respondThe Bell Sanction is a lightweight, low profile full face perfectly suited for those who want full face protection, without the bulk. At 850g it won't weigh you down. It features 15 vents to keep you cool and an adjustable visor to keep the sun out of your eyes. Who's this item for: Designed to be used for gravity focussed riding, the Sanction is perfect for DJ, Slopestyle, or shuttle days. Construction: It features an ABS plastic hardshell