Decent back-up goggles.
I've had my Spy Targa II's for almost 3 years now. They are comfortable and the anti-sliding strip is nifty and really helps keep the goggles on your helmet. Your vision is pretty narrow. Not a whole lot of peripheral vision. Low/Flat light is horrible. You can't see anything. No features in the snow. This makes it extremely difficult on a stormy day. But during a blue bird they work relatively well. I would say bring these along just in case your primary goggles get hung up in a tree or break.