18 vents bring in fresh air and release hot air, well ventilated. Removable, washable and antibacterial soft ear pads for better wearing comfort. Rotatable inner adjuster adjusts the tightness of the helmet. Specifications: Color: AS the picture shows. Material: Durable PVC and PCEPSVentqty18vents LIGHTWEIGHT AND VENTILATION This cycling helmet is made of lightweight material and the inner pad uses breathable material for comfortable wearing. CAN ADJUST FOR DIFFERENT HEAD SIZES: The Ddial retention system is easy to adjust and ensure the perfect fit of the cycling helmet on your head. It is very important that you put the helmet on your head correctly because potential dangers easily occur with small or large size helmet. Please measure your head circumference correctly before purchasing, this helmet fits head circumferences 21.26-24.8in. INTEGRATED DETACHABLE VISOR: Sun visor on bike helmet is a must-have for all mountain bike lovers. This reinforced sun visor is perfectly designed to match this cycling helmet for you. Safe, the vents on the visor ensure airflow passes through to keep you cool. The large visor with insert net can better protect the discomforts from the sun, leaves and other elements, so you can have 100% attention on cycling. PERFECT SIZE: This adult cycling helmet fits a standard size. Equipped with the easy-to-use dial system and side straps, this nutcase helmet is adjustable to different head sizes and suitable for both men and women. IMPACT RESISTANCE: This nutcase bike helmet is specially designed for adult cyclists. The material uses tough and durable PVC and PCEPS foam which help absorb impact and protect the head during collision. VENTILATION: Adopting customized aerodynamic and ventilation design allows air to pass through the cycling helmet, which helps to increase speed and keep cool. LIGHTWEIGHT: This cycling helmet is made of lightweight material, the inner pad uses breathable material for comfortable wearing. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-2 cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Helmet, 1 x Visor(Can be detached from the helmet.)