Every detail is full of the taste left by time. Retro is mature and wise. It is no longer fast, but the spirit of motorcycles.. It represents the primitive freedom and chivalry of motorcycles. Features of retro half helmet: Carbon fiber helmet body: high quality carbon fiber material, impact resistant, anti-penetration Removable and washable breathable lining, The detachable inner lining is made of fiber fabric, which can quickly absorb sweat from the surface of the human skin to the outer layer of the fabric, and quickly emit moisture. Keep the surface of the human body dry, cool and comfortable. Shell material: ABS The helmet is only 700g±50g, light weight, comfortable inner lining, no fatigue after long-distance cruising after wearing Applicable season: all seasons Applicable gender: unisex Measurement tips: The correct method of measuring head circumference: From the root of the forehead to the back 2 cm (around the head), size: M head circumference/ 57-58cm L head circumference/ 59-60cm XL head circumference/ 61-62cm 1 * Motorcycle half helmet