Performance, comfort, and durability.
When it comes to pack systems for backcountry or mountain hunting, performance, comfort, and durability are paramount — and that all starts with the frame. We have spent the past 3+ years reimagining, developing, and testing what is now the all-new K4 Frame.
Total Weight
2lb, 15oz
Load Rating
150+ Pounds
Frame Structure
Custom Carbon Fiber
Built in the USA with Squadron material, carbon fiber stays, and premium foams...
Materials & Production Details »Real World Reviews
I have been using the K4 frame for about 2 years now. Used for a couple of week long hunts and hundreds of miles of training hikes. This is the most comfortable pack I have ever used and the frame looks and feels brand new after hard use.
Love this pack and the weight to carry weight capability. Nothing compares in today’s marketplace. I’ve been backpacking and backpack hunting for 40years now. Gear like this allows me to keep going in to the backcountry safely and efficiently.
Bought my K4 last February and tried it a few times in the Spring.
Broke my shoulder in the summer scouting for animals and had to get my shoulder replaced.
Wasn't sure if I was gonna be able to hunt elk or deer in the fall especially with a pack.
Well, the pack did not disappoint. Wore it all season and did not bother my shoulder at all even loaded for a five mile hike in for elk.
Excellent pack. Worth every penny. This is my fifth pack. Best one so far in my 45+ years of hunting Idaho.
I did tag out on a decent bull, but had horses so the pack did not get tested with any elk which did not disappoint me at all. Haha.
I purchased my K4 3600 system a couple months back. They shipped it to be in Qatar, where I live and work. Super fast shipping. I trained with it for 6 weeks with up to 80 lbs in the back. Super strong and well built system. Improvement over my Kuiu icon pro. I flew to CO for my week long elk hunt, and used this pack every day in the mountains. Absolutely loved it! 2- miles a day hiking up and down hill at 10-11k elevation. Unfortunately, I didn't get an animal this trip, but I still used this pack hard every day with 30-40 lbs at times. I'm 6-1, 215 lb with a long torso. I used the large belt, with 25" frame with rifle straps, and it worked perfectly. no hot spots, no sore back. My bladder leaked one day, but the water resistant bladder pocket did its job and kept the rest of the pack and me dry. I used the pack almost every day to sit on and glass, and it held up great. Only thing I think could be improved are to add another zipper on the hood/lid large pocket. I kept finding the zipper on the bottom somehow, and it would be nice to have one zipper on the opposite end just in case you find yourself with your bag upside down or flipped over. Very happy customer. I also wish that Exo could release a toddler carrying system for the off season/training/vacation. I (and others judging from the comments on YouTube videos) would use this all the time! The baby and toddler carrying options out there are vastly inferior to this shoulder and belt system.
I purchased the standalone frame to replace an old Dana Designs K2 frame that I wore out. I have put many miles on the new frame this year training and hunting elk and deer and I absolutely love it. It's incredibly comfortable, lightweight, and adaptable for use with a variety bags for different types of hunts. I've used it for everything from day hunting to a 9-day hunt in the mountains.