Eyourlife Adult Cycling Bike Helmet Specialized for Mens Womens Safety Protection - Black / Red / White ADJUSTABLE - This adult cycling helmet goes with a standard size, equipped with the easy-use dial system and side straps make this nutcase helmet adjustable to different head size IMPACT RESISTANCE:This nutcase bike helmet is specially designed for adult rider. Material use the tough and durable PVC & PC, EPS foam which help absorb the impact and protect the head during crash. VENTILATION:The adoption of specialized aerodynamic and ventilation design allow air go through the biking helmet which help increase the speed and keep stay cool. LIGHTWEIGHT: This biking helmet made of lightweight material, the inner pad use of breathable material to wear comfortably. The visor can be detach from the helmet. You can choose free 100% AUTHENTICITY GUARANTEE: We offer a 60-day unconditional return policy plus a 1-year warranty; we want to know if there are any concerns or questions; please contact us as we stand behind our products