These have an amazing field of view, great lens, and they look killer. But, when worn with my helmet, their large lens put pressure on the foam that went beneath the bridge of my nose. Ordinary goggles sit higher, so it's a non-issue. The pressure on my nose interfered with my ability to breath through my nose. At altitude, oxygen is important. It's even more important than an amazing field of view. This was my second attempt at finding some Zeals that fit, and they are the second style I've had to send back. I'm disappointed with the brand, as it seems they place form over function. I won't be buying any more Zeals.