3rd one I've purchased... best helmet I have used for comfort, fit and protection. 1st one was used well and I retired it. 2nd one was severely damage in a crash and performed very well. Now I am on to my third.

Arai understands that customers do not have similar head size and shape. Made to fit riders with a round head shape, Arai’s Quantum 2 uses laminate construction similar to RX7 helmets to offer superior protection. To reduce drag, front air intakes recess into the shell for optimized airflow while allowing more air to enter for enhanced cooling. Noise reduction designs from RX7’s, like SAJ side panels, carry over for a quiet ride. All Arai’s, including Quantum 2 helmets, exceed DOT and Snell certifications.