The ABUS Hyban 2.0 is the perfect helmet for someone looking for a well ventilated hard-shell helmet. Perfect for the daily commute or recreational riding. Rock-Solid Protection: Built with an ABS hard shell and EPS foam for a sturdy, impact-resistant design. Maximum Visibility: Reflectors and a large, integrated LED tail light with 180° visibility keep you seen at all times. Cool & Comfortable: 5 air inlets and 8 outlets provide exceptional ventilation for a breezy ride. Smart Design Details: Bug Mesh keeps insects out while you focus on the ride. Ponytail Compatibility ensures a comfortable fit for long-haired riders. Zoom Ace Urban System with an adjustable wheel offers a precise, custom fit. Full-Ring Adjustment System wraps the head for added stability. Sizing Options: Medium: Fits 52–58 cm circumference. Large: Fits 56–61 cm circumference.