I've been looking into their stuff. So you really sleep in a non-breathable, waterproof bivy? I don't need the super high tech, ultralight hiking gear that Sarah uses, but I'm working on reassessing "our combined camp gear/things she sure doesn't hate to use when I pack for a trip but takes up a ton of storage room" vs outfitting myself with a much more portable 4-season solution. I'm interested their center zip bags so far. I wonder about how 'crinkly' sounding they might be when you move around at night. Hating that website but liking the product.