I bought a Palm Lite Ultra sleeping bag to use in warmer weather with an ultralight setup... quoted weight is 700g (inc sack), it's even stamped on the bag itself... in reality it's almost exactly on 800g.. might not seem like a big deal, but when you're trying to trade off warmth vs weight, 800g starts to make this bag look like a pretty poor choice... 1kg gets you something much, much warmer. I have hiking gear from many brands and nothing else has anywhere near this amount of inaccuracy in specs.