My wife & I both have ultralight backpacks that weight about 19-22 ounces not including the fold-up Z-lite pads used for support and padding. They are made of a light-weight nylon and carry about 30-35 lbs max. My concern is that theives could easily slice open the pack with a knife and steal the contents that leak out. I don't know how much of a threat this is and wondered if anyone had any experience or knowledge on this.
Also, might there be other down-sides to carrying lightweight backpacks like potential wear and tear issues that heavier-sided luggage would be less prone to?