KASK Protone – Bikeradar.com
The Protone was designed to maintain aerodynamics and airflow in any common riding position, and however you move your head, it remains consistent. We can’t verify aero performance, but with many helmets, dipping or turning your head creates an obvious increase in wind noise, whereas the Protone is incredibly quiet and unobtrusive, and just feels fast.
KASK Mojito – Road.CC
This is a comfortable, cool and lightweight helmet, retailing at £110 – and in some spots a lot less if you're willing to scout around for a bargain. But even at full price you're getting a lot of helmet for your money. And, perhaps significantly for some, it's available in more colourways than I care to list, which is great for the colour-matchers out there.
KASK Rex – Ridingagainstthegrain.com
It’s light, it’s well ventilated, and thus far (six or so months in) has proven very durable. Fit is true to form for Kask–I’m decidedly a L/XL, but can just barely squeeze into a M if it’s all the way loose (and if I don’t wear a cap). I have not yet tested the crashworthiness, but I’m comforted to see how well it covers the sides and rear of my head, as a good MTB helmet should. Quality has been typical Kask, which is to say perfect.