Choosing a Frameless Pack

How much weight do you want to carry in this thing? And two, what? What sin are you going to go for that helps mitigate some of this? For me, a frameless pack is 15 pounds or less. The the packs on the high end of the scale typically have some way of integrating a sleeping pad into the frame. It's really short trips, light loads and casual for the casual back packer.