Size: Medium I used them helmet for a couple rides and has been stored in the helmet bag in the cabinet. Reason I switched is for different colors. Streamlined and Race Ready The O’Neal 5 SRS Helmet is constructed using a lightweight ABS shell. This 5 SRS line pairs a Coolmax® liner with multiple air vents to help keep you cool and dry during longer rides and hot summer motos FEATURES: Lightweight ABS shell construction Shell weight (size large): 1380grams (±50) Coolmax® liner Ultra-plush, removable/washable padded liner keeps you cool and dry by wicking away sweat Adjustable visor design Multiple air vents help keep you cool and dry Durable multi-colored matte coated graphics