I said 10-20, but the clothes I keep on tend to be heavier than most. I tend to keep my wool on and count the other layers including skin layers and wind layers and hats and mitts and stuff as pack weight. But I think skin out weight is what really matters. Why the preoccupation with pack weight? On my last 25 hour ski trip I was 29 pounds skin out including 2 pounds of food and 2 pounds of water but not counting skiis and poles. Just as likely to be over 20 as under 20 though. I think these would have been better increments.

5-10
10-15
15-25
25-35
35-50

So why the pre-occupation with pack weight?
Isn't skin out weight what really matters, and total weight on feet?