Fill weight or Packed weight? Fill weight is not the same as packed weight, but it is a definite indicator of temperature rating (Tr)
I bought the MacPac Dragonfly yesterday to replace my 28 year old (but still fully functional) Snowgum Colloir 500. Yes, it is pricy, but get a decent discount if you are a MacPac member.
Though it fits me snuggly (I'm not a tall person), it may well swallow an 8 year old, but he'll be toasty warm!!
981gm packed, with compression sack that makes it very, very tiny.
Tr is Comfort —3°C | Limit —10°C
| Extreme —29°Chttps://www.macpac.com.au/macpac-standa ... 20076.html
Don't make guesses with temperature ratings and weight when venturing into the alpine area, especially in winter. School kids everywhere are regularly carting around much heavier bags, albeit with terribly mismatched Tr ratings for their destination (e.g. out of Hotham).
Avoid the temptation of buying overseas; the sheer hassle of organising returns, etc., along with the impost of GST at the gate, makes it a foregone conclusion. I stopped buying anything from overseas in 2014. Was a big user of products from REI .