The price and functionality. They're also "helmet compatible." I've had no trouble from these goggles in weather conditions ranging from sleet to blizzard to sunny.

The straps may be a little tight for users with a larger helmet size.

This is a great goggle for the money provided you don't wear an XL+ helmet. Visibility and air flow are excellent on this google and comfort is more than adequate. The ACS system is highly functional and virtually eliminates all fogging. The only negative for me is that I wear an XL helmet and I didn't have it with me when I purchased the goggles. Even with the straps out to their maximum length the goggles apply more pressure to my face than other goggles I've tried. They were never uncomfortable by any means and the only side effect of the tension is that my face seems a little stretched when I wear them. That said I am still using the goggles and don't plan on parting with them. They have performed well and the tension quirk may work itself out as the elastic begins to age.

Similar Products Used:

Spy Targa Snow, Carrera cheapies.