The Aduro 2.1 is a helmet for ambitious bikers. With its intelligent features, perfect fit and high standards of absolute safety, the Aduro 2.1 is always the right choice for cycling.This helmet is at home everywhere; whether on the wide country road or on the demanding trails in the woods and mountains. Maximum comfort, optimum ventilation and perfect safety are guaranteed.Key Features:In-Mold for a durable connection with the outer shell with shock-absorbing helmet material (EPS),High visibility due to bright reflectors,Foamed-in fly nets,Ponytail compatibility: Helmet well suited to plait wearers,Excellent ventilation with 3 air inlets and 10 air outlets connected with flow channels,Zoom Ace: Finely adjustable adjustment system with handy adjustment wheel for customisable fit,Size adjustment via a solid ring made of 2 plastic components for optimum stability and positive fit.