Trek's Circuit WSD is a lightweight road helmet that features 21 vents for maximum airflow. It features Trek's QuickFit strap and ZipTite 2 Elite fit system, plus it has an InMolded strap retention system for a superb fit and top-notch safety. The wicking fit pads not only give you a custom-fit feel, it also helps keep your head dry on those hot rides.
Trek's Sonic Elite has Trek's ZipTite 2 fit system and QuickFit straps plus a whopping 24 vents for a custom fit and feel and top comfort. It's also so light you barely know you have it on and it boasts Trek's Hard Cote InMold construction for top-notch protection and durability.
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