Nathan H.wrote a review of Kask Utopia Helmet on April 30, 2020
Familiarity: I've put it through the wringer
The Protone has long been one of my favorite helmets. Great fit and good construction to include the nice leather strap. The Utopia is similar in fit to the Protone so this is a great option if you like the Protone. I’ve been surprised on the comfort and the venting versus some of the reviews I’d seen leading up to the purchase. I haven’t had any comfort issues even on 4-5 hour rides and it vents really well for an aero helmet. Is it more aero than the Protone, it’s hard to say for sure without going to a wind tunnel but I don’t think I’m losing anything in comfort or temperature management so why not!