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The One K Defender Helmet** is a synergistic blend of advanced technology and aesthetically pleasing design. This high-tech equestrian helmet can be appreciated by even traditionalists. The Defender Helmet has an advanced polycarbonate and ABS injection molded outer shell with a durable Chamude synthetic suede cover. Stainless steel mesh vents on the sides back and front encourage air circulation. A washable quick-drying moisture-wicking antimicrobial liner helps keep it fresh. The padded harness is lined in synthetic suede lining and has a hook-and-loop adjustment strap with Fastex buckle. Long oval available by special order. **ASTM F1163-15/SEI Certified. Imported. Sizes S6 5/8-6 3/4 M6 7/8-7 L7 1/8-7 1/4 XL7 3/8-7 1/2.