TRAAV is absolutely correct. You need to have something that is at the very least, water resistant, so snow wont stick to it, and so that wet/melted snow wont soak in, freeze and make it stiff. Cotton bed sheets soak up water, freeze and get hard and brittle. Avoid ANY overwhite military issue overwhite suit that is cotton or a cotton blend. Some made out of nylon are pretty good though, you can try searching the net for the Trojan Overwhites by DHK. I've got a few sets for back ups if you're in a bind and want to go "ALL WHITE"
ptrlcop, the Arctyrx Wraith are absolutely, unequivocally and most certainly are NOT WHITE. I bought the jacket and pants both last year, thinking they would be a great option, and they are GREY. Not even close to being kinda white. They are GREY. Period. I was very upset when I get them and returned them immediately.
There are a lot of really really good options, but the best ones aren't going to be cheap. The USMC versions as well as the ones made by VERTX are great for camo, but they are an inferior type of nylon with no DWR finish so they get wet and they freeze really easy. I had a set of these and ditched them as well.
The most effective system I've used so far is an overwhite suit that we had the pleasure to test made by
Applied Orange in Pencott Snowdrift. (Same as the Tyrannus suit) The fabric is not waterproof, but it's got a good enough DWR coating that water beads up and snow just falls off, even after sitting and laying in it for hours. There are a few companies making overwhite suits out of it, but your best bet for a "budget" system is to contact a company called
Domari Nolo Defence Consulting, and see if they can make you a CLFP jacket, and you might be able to talk them into making you a trouser as well. They do a lot of one off, custom stuff. Tell them O'Neill Ops sent you and you need some snow camo.
O’Neill Ops mix it up a bit with BadLands™ and SnowDrift™
Some of the other guys making snow camo suits out of this pattern are
SABRE, Drop Zone Tactical (as already mentioned)