I normally use a foodsaver to vacuum pack socks and a stocking hat, etc. that get stashed in a go bag or car kit. In theory that keeps them dry and shrinks down the amount of space needed to stash them. But I got thinking tonight - does it end up "ruining" them like keeping a sleeping bag stuffed all up in a tight bag ruins the insulation value of the bag? I'm talking nice thick wool socks or a big thick stocking cap here, not cheapo walmart cotton socks.