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 certified. Import. Color: Black Sizes: Small (6 3/8 - 6 1/2) Medium (6 5/8 - 6 3/4) Large (6 7/8 - 7 1/8)