ROCKBROS Adult Cycling Streamlined 18 Ventilation Adjustable Sizes for Road and City Riding Helmet, Ultra-Lightweight, High-Durability,

[Impact Resistant] The surface of this bicycle helmet is made of high-rigidity PC material, which effectively absorbs external impact forces and provides solid head protection. The built-in EPS impact-resistant material reduces impact during collisions and provides maximum head protection in the event of a fall. The one-piece molding creates a tight fit, making it lightweight yet provides the same impact dispersion effect as a hard shell helmet. [Excellent Breathability] This aerodynamically designed, streamlined bicycle helmet looks great and makes cycling comfortable. 18 ventilation holes allow fresh air to circulate inside the helmet, preventing stuffiness. The removable and washable inner padding ensures comfort even when worn for long periods of time. Ultra-Lightweight: Made with a one-piece molding and ultra-lightweight EPS material, the helmet weighs just 250g. This reduces pressure on your head while riding, making for a more comfortable and stress-free cycling experience. Available in four colors, this stylish and practical helmet is a must-have for anyone who commutes by bike. [Adjustable Size] The size adjustment dial on the back of the road bike helmet allows you to adjust the size to fit your head circumference. It provides a comfortable fit and is extremely safe. The one-touch chin strap allows for easy one-handed installation and removal. [Manufacturer's Warranty] This unisex cycling helmet comes in two sizes: M size (suitable for head circumferences of approximately 55-58cm), L size (suitable for head circumferences of approximately 58-61cm). We offer a six-month warranty, so if you have any issues with the product, please feel free to contact us. We offer refunds, returns, and exchanges.