THE BUDGET-FRIENDLY HELMET YOU WERE AFTER Deftly engineered for the demands of the modern-day mountain biker, the 100% Altis utilizes our proprietary Smartshock suspended rotational system coupled with 14 ventilation ports resulting in a safe, breathable, and budget-friendly trail helmet. Add the adjustable visor for cohesive storage of all 100% eyewear and goggles, and you’re ready to hit the trails. FEATURES Smartshock Rotational Protective System (11 points). High-Density EPS foam injection moulded with polycarbonate in size-specific moulds (XS/S, S/M, and L/XL). Massive airflow with an impressive 14 ventilation ports. Expanded coverage while still lightweight. Multi-point adjustable visor designed for maximum vision and goggle stowage. Washable, moisture-wicking, anti-microbial liner. Adjustable ratcheting fitment system. Nexus push release snap-buckle. SIZE CHART SIZE US S M L XL SIZE EU 52 - 56CM 56 - 58CM 58 - 61CM 61-64CM CHEEK PAD 28MM 28MM 28MM 20MM SPARE CHEEK PAD 24MM 24MM 24MM 24MM CHEEK PAD COMPATIBILITY UNIVERSAL FIT UNIVERSAL FIT UNIVERSAL FIT UNIVERSAL FIT LINER 14MM 10MM 20MM 16MM SPARE LINER 12MM 12MM 22MM 18MM LINER COMPATIBILITY S or M S or M L or XL L or XL NECK ROLL 20MM 20MM 20MM 15MM SPARE NECK ROLL 25MM 25MM 25MM 15MM Industry Reviews 100% Altis helmet review It's excellently comfortable." Read more The 100% Altis is a Top Notch Half-Shell Helmet for Just $100 The 100% Altis is a Top Notch Half-Shell Helmet.” Read more