Dunlop Bike Helmet Size S 51-55 cm Red 2105624. This adjustable Dunlop bike helmet is lightweight and comfortable, providing effective protection while cycling, scootering, or rollerblading. Foam padding absorbs impact energy, and the adjustment system allows for a perfect fit. Ventilation openings ensure thermal comfort, while the removable visor protects from the sun and obstacles. The helmet meets the EN 1078 safety standard. Technical data: Material: Plastic. The helmet complies with the European EN1078 standard and is CE certified. Head size / circumference: S / 51-55 cm.