Technology:Composite Fusion Plus - Incorporates layers of multi-density cone shaped EPS foam, reduces impact g-forces up to 25% Features: Break-away visor Accessory mounting system Anti-microbial pads Removable/washable liner Material: Tri-weave shell EPS foam Vents: 6 Helmet, 6 Chin bar Sizes:XS 53-54cm S 55-56cm M 57-58cm L 59-60cm XL 61-62cm Weight: 900 grams