I loved these, and they look great on. I thought I could get away with wearing my spex, but they steamed up on me :cry: So it's back to my trusty L Frame's.
They are definitely helmet compatible, the strap has a double adjuster, and the frame size will suit small to medium faces.
See the photos for the detail. Best offer over £25,you pay postage. Will post to UK only.
Drop me a PM on here if you are interested :D