Trek Circuit WaveCel Helmet S/M though compatible with 9

though compatible with 9

No-compromise

Trail Fusion

The ABS outer shell makes the helmet particularly impact-resistant

Special hardened steel

Trek Circuit WaveCel Helmet S/M though compatible with 9Whether your finish line is on the race course or your front door, Trek Circuit WaveCel delivers the performance, comfort and tech to be your go to helmet. It's equipped with features that any rider will appreciate, like WaveCel technology, a BOA Fit System and Blendr mount systems. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Trek exclusive technology disrupts the safety standards that the industry has