The Brentwood 2.0 Literally Set The Stage For Urban Bike Style. It Was Adopted By Nyc Bike Messenger Legend Kevin Squid Bolger And Even Found Its Way Into A Hollywood Movie. Everyone And Their Mother Has Made A Crappy Knock Off Of This Thing, So We Did What We Do Best—Kept Making It Better. The Brentwood 2.0 Represents 15 Years Of Tireless Upgrades To Our Zipmold+ Safety Tech In A Helmet That'S More Ventilated And 15% Lighter Than The Original. The Brentwood 2.0 Features That Signature Bern Style In A Helmet That'Ll Help You Stay Out There—Not In The Crowd.Features:- All Season: Pick The Model That Best Fits Your Style And Customize Your Helmet With Our Range Of Seasonal Upgrades.- Quickmount Light Compatible: The Quickmount Asteroid Is A Micro-Usb Rechargeable Bike Light. It Is Easily Fastened To The Two-Hole Mount Located On The Rear Of The Helmet'S Shell.- Ez-Fit: Like It´s Name This System Is Easy! A No Fuss Elastic System Auto Adjusts To The Perfect Fit Everytime, Just Put It On And Ride!- Mips: Multi-Directional Impact Protection System. Designed To Protect Against Rotational Violence To The Brain Caused By Rotational Impacts.- Zipmold+: A Pvc Micro Shell Lined With Proprietary Zip Mold+® Liquid Injected Foam Construction That Has A Higher Strength To Weight Ratio Than Traditional In-Mold Helmets, Creating A Lighter, Lower Profile Helmet.Specifications:- Avg. Weight 345 Grams- Construction Zipmold+- Fit System Ez Fit- Vents 13