Olympian DFS Helmet by International Riding Helmets (IRH) Covered in rich and durable velveteen, ventilation achieved through the top button and rear vent ports. Removable, washable, front pad system. Fully adjustable, quick-release harness coupled with IRH DFS technology. ASTM/SEI certified. Import. ASTM F1163-04A/SEI Certified & CE certified to European EN 1384 Standards* * Click on Important Helmet Warning to the right Features: Velveteen covered Top button and rear vent ports Removable, washable, front pad system Fully adjustable, quick-release harness IRH DFS technology Item Specifications: Color: Black Sizes: Small (6 3/8 - 6 1/2) Medium (6 5/8 - 6 3/4) Large (6 7/8 - 7 1/8)