Hi, the other half's dad wants a rucksack for on the bike. The thing is, he doesn't want a bag specifically designed for riding on a bike (like I would suggest). He is hooked on a military style bugout bag since he caught glimpse of mine. I think he likes the molle systems and straps etc.
Always though Kriega to be overpriced and overengineered, personally. They're good enough, but I prefer something either more modular and/or that I can modify my own self... which is where I suspect the gentleman in question is coming from.
I use a Karrimor Predator TECMAC 50, myself.
It's a proper infantry bergan, designed to carry a manpack radio (and operator's kit) that went out of service almost the same day the bergan was brought in!!
It's actually made by a competent company and just using the Karrimor brand name, from back when K were good enough to get military contracts.
The Predator series has PALS webbing for your MOLLE add-ons down the back, both sides and even on the waist belt. Also accepts PLCE side pouches, has detachable floating lid, roll-top waterproof inner, compression straps, side pockets, internal zip pockets, drawstrings, D-rings and attachment points, QR clips everywhere and all the funky features you'd expect.
Mine compresses down to about 25 litres if I'm only carrying a light load, but expands to a good 50 litres (plus add-ons) if you need it. Also highly adjustable, so you can get the perfect load balance for on the bike, even with heavy loads (like the weekly shopping). I wouldn't usually need to access it with gloves on, as I'd have to stop and get it off my back anyway, but it's still very easily done with the paracord zip pulls and so on.
I got the DPM version *very* cheap, as it was being sold off following the new MTP adoption. The OG one is more than double what I paid, at about £170.
Bugout bags are usually smaller, though, but there are a stack of them once you get down to it. The more you look at what's available, the more of them you find!
Mostly it's about whether you want two shoulder straps, or a single-strap 'slingpack' style, followed by any particular features you might want.
