The Bell Trace Helmet is the ultimate all-purpose performer. Ideal for fitness rides, adventure rides or just family rides around the neighborhood. With its easy, approachable style, the Bell Trace Helmet is an all-around performer that gives you lots of options. The Ergo Fit system offers a slim, easy-to-use dial, plus No-Twist Tri-Glides provide smooth fit adjustment. Bell Trace Helmet Features No-Twist Tri-Glides™ Sweat Guide™ Construction: Fusion In-Mold Polycarbonate Shell, Ergo Fit™ Certifications: CPSC Bicycle, CE EN1078 Bell Trace Helmet Specifications Ventilation: 16 Vents Weight: 320g (size U) Size: Universal Adult 54–61cm