Replacement goggles for Von Zipper stuff is a bitch to find. Your best bet is to find a local shop that carrys VZ goggles and ask them to order the lense for you.
The Brown gradient lense is the best in cloudy and overcast conditions. If you are talking like super low light conditions (night or dusk) you would want to go yellow.
Last edited by PapaWood; 01-09-2008 at 08:17 PM.