Triathlon helmets prioritize aerodynamics over ventilation — the opposite philosophy from road cycling helmets. Closed-back designs reduce pressure drag created by conventional open-vent helmets, and the elongated tail keeps the shell aligned with the spine for maximum aero benefit in the low, aggressive triathlon position. Integrated visors block sun and wind without the transition penalty of separate eyewear. Most modern tri helmets are UCI and World Triathlon legal for age-group and pro racing.

Giro’s Aerohead MIPS II is one of the most tested aero helmets in the category, combining a proven shell with MIPS rotational impact protection. Kask’s Mistral and Bambino Pro represent the brand’s flagship aero offerings, refined through years of elite racing. Lazer’s Volante and Victor use Kineticore — a proprietary impact-absorbing foam integrated directly into the shell — eliminating the rotational liner while reducing weight. The collection spans from accessible options to top-tier race lids.

Complete your triathlon setup with a look at our triathlon bikes and triathlon accessories, or browse our full selection of men’s road bike helmets if you also ride outside of triathlon.