Bell Trace Helmet - One Size Fits Most - Matte White - SilverAll Purpose Performer. Fitness rides, adventure rides, family rides around the neighborhood with its easy, approachable style, the Trace 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. SPECS: CONSTRUCTION: FUSION IN MOLD POLYCARBONATE SHELL A PROCESS PIONEERED BY BELL BONDS THE HELMET'S OUTER SHELL TO THE EPS FOAM LINER TO CREATE A