For sale, I've got a Marmot Hydrogen mummy bag in used but perfect condition. I got the bag used, I laundered it once and have not used it since. Has the cloth storage bag but no stuff sack. Tag says 30x80 but it's a size regular based on my other Hydrogen. This is my third Marmot bag (2 hydrogens 1 helium). They're great bags and last forever if you take care of them properly. $200 shipped CONUS.