GEAR UP FOR THE ASCENT. Jump into the heart of mountain biking with the Leatt MTB All-MTN 2.0 helmet. Perfectly tailored for the emerging high-altitude rider the helmet offers affordability without compromising on the quality for which Leatt is renowned. Showcasing a modern design the MTB All-MTN 2.0 helmet is as stylish as it is functional. 360° Turbine Technology offers unparalleled protection and the adjustable visor is designed to take on the unpredictable mountain terrains with ease. For those eager to carve their path in the world of mountain biking the MTB All-MTN 2.0 helmet is a more-than-trusty companion. Lightweight polymer shell in three sizes Sunglasses dock port for easy secure storage.  Fidlock magnetic closure system 360° Turbine Technology Reduced peak brain acceleration by up to 30% at impact speeds associated with concussion Reduces peak brain rotational acceleration by up to 40% Adjustable visor with breakaway function for rotational impact force reduction In-molded impact foam for superior energy absorption Maximized ventilation with 20 vents effective even at low speeds  Moisture wicking breathable anti-odor and washable inner liner Certified and tested: AS/NZS 2063:2008 EN1078 CPSC 1203 Weight: from 375g 0.83 lbs Sizing#S 51-55cm – 20-21 58" #M 55-59cm – 21 58- 23 14" #L 59-63cm – 23 14 - 24 34"