If Big Agnes can utilize HyperBead fabric in ultralight, incredibly durable, and entirely waterproof jackets without forever chemicals, it might mark a sea change across the entire outdoor industry.

Our army of testers put 20 ultralight packs through their paces across seven states and ten countries. These are our top picks.

He recently flew the fourth ultralight, which he designed and built himself. For a taste of what’s going on here, the wings have aluminum tube spars and are made of hot-wire-cut styrofoam sections.