Helmet MTB AllMtn 4.0The AllMtn 4. 0 helmet delivers DH certified protection in a lightweight, open face designgiving aggressive trail and e MTB riders downhill level impact protection. Built with in moulded EPS + EPO impact foam for enhanced energy absorption, it is certified to ASTM F1952 15 (downhill MTB) and NTA 8776 (e bikes going up to 45km h 28 mph) standardsmaking it an ideal choice for aggressive rides and e MTB adventures. Leatts 360 Turbine Technology helps
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