This-is-Nolan-rsquo-s-off-road-full-face-helmet-It-is-characterised-by-an-aggressive-design-ample-technical-features-&-a-wide-range-of-colours-&-graphics-Its-compact-volume-thanks-to-the-availability-of-two-outer-shell-sizes-extra-wide-window-Air Booster-Technology-upper-ventilation-system-&-Clima-Comfort-inner-padding-designed-in-consideration-of-the-heavy-use-of-the-product-make-the-N53-an-already-much-appreciated-product-a-year-on-from-its-launch-This-was-also-confirmed-by-its-use-during-the-2016-Dakar-Features-Polycarbonate-shell-2-Shell-sizes-XXS-L-XL-3XL-ECE-22-05-7-Inner-Shells-Double-D-Ring-Comfort-Peak-Clima-Comfort-Liner-removeable-Cheek-Pads-removeable-Helmet-Bag-Ventilation-Airbooster-Technology-Top-Ventilation-Frontal-Air-Intake-Chin-Guard-Air-Intake-Top-Air-Exhaust-Rear-Air-Exhaust-Bottom-Trim-Air-Exhaust-Chin-Guard-Filter-removeable