Circuit

Information from: http://bontrager.com/model/09101.

Styled for maximum airflow and go-fast good looks, the lightweight, 21-vent Circuit was designed using Computational Fluid Dynamics, for an air-gobbling shape that delivers superb ventilation and unbeatable air flow.

Features

In-molded strap retention system with Lockdown strap adjusters

Three sizes assure the best fit

One-hand adjustable Zip-Tite fit system

Premium, wicking fit pads

21 CFD software enhanced vents for maximum airflow and efficiency

Lightweight road helmet for superior performance