I built a 1.1oz single layer for my son (145 lbs.) using AHE's 23 gram carabiners on each end. Kinda like Grand Trunk's Nano 7.
Got it finished moments before Super Bowl kickoff & it held my 230 lbs. the whole game. Plenty comfortable, but I wouldn't take it out to sleep in. It will suit my son fine, but I would agree with Warbonnet's 185 number.