With all these super high postage rates, I've been trying to find a way to make my packages as light as possible. I was thinking about using those plastic bags that Victoria's Secret (and others!) uses to ship it's packages. They seem really durable and one time they even shipped with a pair of shoes inside! Are these bags called Tyvek bags? I'm not sure where to find them. Also, if you were receiving something you bought off eBay in one of these bags, how would you feel? Should I just stick to boxes? Obviously I wouldn't be mailing leather purses in these bags, but stuff like clothes, flip flops, LeSportsac bags, etc.