Since the pack is gonna be mostly a warm weather bag, I think keeping it under 20lbs. shouldnt be a problem, under 30lbs. definetley. I used my digital fishing scale to weigh my spring/summer/fall gear and it totaled out at 12lbs, with a full 2L platypus. Im really looking forward to the lighter weight and some new gear. BTW, has anyone ever used the SMD Webbing belt? thought of trying it instead of the WingBelt.