To my eyes the pack rafts are almost an exact copy with mods of fighter aircraft one man rafts. When I was a kid many moons ago there was a glut of these surplus rafts (mid 7o's) and you could pick them up very cheaply and a few folk did. They had to be very light and pack very small, don't think they were as tough as pak rafts, not sure never seen a packraft, but recently you could get mig jet pilots life rafts but they had an enclosed canopy that could be easily modded. I've often thought about it to be honest. Seems like a great idea for when you can't through a canoe on your roof or for packing into places
WS

WS