One for all: The pump sack from Vaude is a lightweight piece of equipment for anyone who doesn't want to inflate their sleeping pads with their mouth, to prevent moisture from their breath from freezing inside the pad and significantly reducing its performance. The pump bag fits with its universal valve on all common sleeping pad models from Exped to Therm-a-Rest (older models) and Sea to Summit, as well as Outwell camping mats. When the sack is not in its primary use, it can also be used as a waterproof stuff sack.