>>2850973well I'm looking forward to your review when you receive it, but i would be surprised if it's actually -10. at least, i bet it's worse in terms of how easy it absorbs water, down loses warming power very fast if it gets wet, and good bags do special treatment or something on the feathers
i looked at chink bags last year or so and i remember naturehike for example is similar to any western brand for most things (sleeping bags, backpacks, tents) that's why i'm sceptical
also it says 0c Comfortable Online Temperature in your picture, whatever that is. and look at the scale in pic related, maybe it's just false advertisement and you bought a 0c bag, not -10. but let us know when you receive it, maybe i'm wrong