Kirafu makes a great pack BUT they are heavy. Let's compare my Seek Outside Revolution Fortress 6,300 with the Kirafu Cavern on a 26" tactical platform frame. The SO would be fully waterproof but the Kirafu would need a pack cover
Cost of the Kirafu would be $764 and weigh 7lbs 1oz. (with pack cover)
Cost of the SO would be $529 and weigh 4lbs 2oz.
https://store.kifaru.net/all-frames-c38.aspx
https://seekoutside.com/hunting-backpacks-breakaway/
Kirafu makes a gazillion add-on items (pockets, pouches, etc) so you get more to chose from for customization, no question about it. Check Kirafu.
SO is significantly lighter. Check Seek Outside
SO costs significantly less. Check Seek Outside
Kirafu is a more recognized name in the hunting pack industry. Check Kirafu.
You could lighten the weight of the Kirafu by 14oz if you choose the Ultralight frame but I don't know what you're giving up in the process. You should check it out to be sure. I think comfort is paramount so if you can try both on first before buying, I would do so. If not, I'd suggest buying both and returning the one you like the least.
A lot of people like the SO Lanner 5,400 and Saker 7,400 for a hunting pack. Me, I like simplicity with minimal pockets on the outside. It depends on what you're looking for from a pack. If you're looking at Seek Outside, Kirafu, Exo, Mystery Ranch and Stone Glacier, you're going to get a good pack. I'm partial to Seek Outside because it is the lightest of the group , can be customized, is waterproof, and rides like a dream.
You'll get excellent discussions and information about the packs from all of these companies here:
https://www.rokslide.com/forums/forums/backpacks.16/
One last thing about the SO Revolution Fortress 6,300. The volume is 6,300ci for the main bag, the Talon (center pouch on outside) is 800ci for a total of 7,100ci or 116 liters of storage. I added two belt pouches and a top lid for another 16 liters of storage. The main bag rolls down into a small bag when you're not hauling volume so it is not bulky at all and can be used as a day pack.