I have some old overwhites by Spartan in a Realtree-like pattern. They are a mesh similar to a bug suit so they weigh nothing and can be slipped on over the top of my normal gear. That's a great advantage here where you may start out at sea level on bare ground and then climb to 2500' in a foot of snow by the end of the day. They fit in your pocket and save a second set of outerwear; they were cheap too. I bought the stuff over 15 years ago and haven't seen it anywhere since. I'd like to get a second set since I keep tearing the legs with my crampons.