Lightweight and SafeThe mountain bike helmet is made of high quality EPS (Expanded Polystyrene) expanded polycarbonate shells, so it is very durable and comfortable to wear and can absorb impact to protect your head and provide more safety.BreathableSpecial aerodynamic design and 18 breathable ventilation holes in the bike helmet effectively reduce air resistance and sweating. The removable insect net protects your head from insect bites when riding in hot and humid conditions.General SizeThe bike helmet size is adjustable (54-64cm), suitable for adults, men, women. Perfect for mountain biking and racing bikes in the city or suburbs.More Protection: The bike helmet is specially designed for mountain bikers who experience adventure on hiking trails. It provides better head and face protection, and the sun visor can protect your face from the sun and occasional branches.MultifunctionalA removable magnetic visor is available and can be worn with the helmet for men or women. No more worries about wind, sand and sun. Perfect for many outdoor activities. Note: the visor can be worn over prescription glasses.Description:Material: EPS granules + PC sheetColor: red and black, black and white, white and red, green and black, blue and black, white and blacksize: one sizeSuitable head circumference: about 54-62cm, adjustableApplicable gender: neutralVentilation hole: 18 piecesPackage Included:1 * Bicycle Helmet (with visor)Note:Due to the different monitor and light effect,the actual color maybe a slight different from the picture color.Please allow 1-2cm difference due to manual measurement.