Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber 3K M Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber 3K L Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber 3K XL Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber 3K 2XL Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber grid 12K M Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber grid 12K L Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber grid 12K XL Simplified Household Thick Protective Carbon Fiber Helmet Carbon fiber grid 12K 2XL Simplified Household Thick Protective Carbon Fiber Helmet Crushed carbon 12K M Simplified Household Thick Protective Carbon Fiber Helmet Crushed carbon 12K L Simplified Household Thick Protective Carbon Fiber Helmet Crushed carbon 12K XL Simplified Household Thick Protective Carbon Fiber Helmet Crushed carbon 12K 2XL