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Efficiently designed for those that like to move fast and light.
The K4 3600 is an ideal pack system for ultralight adventures up to 3-4 days.
Total Weight
5lb, 8oz
Total Internal Capacity
4,268ci
Expanded Dimensions
8" x 37" x 10.5"
PACK FEATURES
Designed for simplicity, versatility, and efficiency.
Any Load. Any Time.
Any Load. Any Time.
Quickly separate the bag from the frame and carry any load between the bag and frame. Compression straps built into the frame offer secure compression for quarters, boned-out meat, load cells, or similar items.
Roll-Top Access & Compression
Roll-Top Access & Compression
All K4 Bags feature roll-top access into the main bag. The roll-top also allows you to expand/contract the pack volume as more/less space is needed.
Efficient Zip Access
In addition to the roll-top access into the main bag, all K4 Packs feature front zip access. The K4 5000 has horseshoe-shaped zip access, while the K4 3600 & K4 7200 feature a full-length straight side zip.
Front Stretch Panel
Front Stretch Panel
A zippered front panel built with specialized stretch fabric offers quick and secure access to items you need throughout the day, such as an extra layer, a glassing pad, gloves, or similar items.
Full-Length Side Pockets
Full-Length Side Pockets
Every K4 Pack features full-length, zippered side pockets on both sides of the bag. The pocket is pleated, offering spacious storage for full-size spotting scopes, even when the main bag is full.
Top-Entry Side Pockets
Top-Entry Side Pockets
Built with stretch material, both sides of every K4 bag feature top-entry side pockets that work great for tripods, trekking poles, water bottles, and the like. The pack's upper side compression strap keeps tall items secure.
Always Accessible
Dual-compartment side pockets feature a quick-access compartment, keeping essential items easily accessible while you are wearing the pack. Perfect for your headlamp, gloves, phone, snacks, or other commonly used gear.
Secure Attachment
Secure Attachment
Laser-cut MOLLE panels on the hipbelt and shoulder harness offer secure mounting of K4 Accessories, as well as 3rd-party MOLLE-compatible accessories and holsters.
K4 Lid Included
This K4 Pack System includes the K4 Lid, which offers two storage compartments that add nearly 650ci to the pack's capacity. The lid also works great as a compression panel when packing out a skull and antlers at the end of a successful hunt.
Water Bladder & Wet Storage
Water Bladder & Wet Storage
All K4 Bags feature a dedicated water bladder compartment. The waterproof lining and bottom drain grommet keep your gear dry if your bladder leaks. The area also works great to keep wet items (such as a tent fly) separate from the dry gear inside the main bag.
Built for Bows. And Rifle Ready.
Built for Bows. And Rifle Ready.
Integrated compression straps on the face of the pack work great to secure your bow to the bag. For rifles, we have a Quick-Release Rifle Carrier accessory, or you can also strap your rifle directly to the face or side of the pack.
Lock-Down Every Load.
Lock-Down Every Load.
All K4 Packs ship with a pair (1 male, 1 female) of accessory locking buckles, which are perfect to secure awkward loads. Use them on shed antlers, your weapon, or more. Additional locking buckles can be added, if needed.
MADE IN THE USA
All of our Packs and Pack Accessories are built in our hometown of Boise, Idaho, USA. We only use the highest quality materials — such as MIL-SPEC 500d Cordura, YKK Zippers, and our custom-engineered carbon fiber frame stays.
K4 FRAME
Built for comfort, performance, and durability.
PERFORMANCE IS THE PRIORITY
Learn what sets K4 Pack Systems apart...
| K4 2200 | K4 3600 | K4 5000 | K4 7200 | |
|---|---|---|---|---|
| Weight: Bag Only | 1lb, 10oz | 2lb, 1oz | 2lb, 6oz | 2lb, 8oz |
| Weight: Bag + Frame | 4lb, 9oz | 5lb, 0oz | 5lb, 5oz | 5lb, 7oz |
| Weight: Bag + Frame + Lid | 5lb, 1oz | 5lb, 8oz | 5lb, 13oz | 5lb, 15oz |
| Capacity: Bag Only | 2,192ci | 3,620ci | 5,010ci | 7,180ci |
| Capacity: Bag + Lid | 2,840ci | 4,268ci | 5,658ci | 7,828ci |
| Dimensions: Expanded | 7" x 25" x 10.5" | 8" x 37" x 10.5" | 9.5" x 39" x 10.5" | 13" x 43" x 10.5" |
| Dimensions: Compressed | 2" x 25" x 10.5" | 2.5" x 25" x 10.5" | 3" x 25" x 10.5" | 3.5" x 25" x 10.5" |
WHERE CAN I TRY A PACK?
We do not have dealers or retailers and only sell direct-to-consumer online. (If you are in the Boise area, you can "try and buy" at our shop.)
We do have a 30 Day Trial Period, allowing you to receive the pack, test the fit and function, and make sure the pack is exactly what you need. LEARN MORE
WILL YOUR PACKS FIT ME?
Yes! With 4 frame height options and 5 hipbelt sizes, the K4 Frame included with all of our K4 Packs can fit just about anyone. FIND YOUR SIZE
DO YOU HAVE A WARRANTY?
Absolutely. Our lifetime guarantee covers defects in materials and workmanship for the lifetime of the product, for the original owner. OUR GUARANTEE
WHERE ARE YOUR PACKS MADE?
We build all of our K4 Packs & Accessories in Boise, ID, USA. We also source US-Made materials whenever possible. MATERIALS & PRODUCTION
HOW DO I _________ WITH A K4 PACK?
We have well over 20 "how to" videos that demonstrate just about everything you may want to know how to do. See all of the How-To Videos for K4 Pack Systems.
I STILL HAVE QUESTIONS — CAN YOU HELP ME?
As a small company, we pride ourselves on offering personal service, and we would love to help you out.
Everyone on our small team is involved with building, testing, and the use of our products for their personal hunts. WE ARE ALL EXPERTS ON OUR GEAR, AND WE ARE HERE TO HELP.
Give us a call at 208-995-4688 or email support@exomtngear.com and we'd be glad to help with any questions you have.
You can also explore more answers to common questions on our FULL FAQ PAGE.
Real World Reviews
After 60 days of using and abusing the K4 Prototype last fall, I can confidently say that it is the most comfortable, complete, and capable hunting pack that I have ever owned. It was clearly created for serious hunters, by serious hunters.
The new K4 is the best pack I have used to date. I used a K4 Prototype on 5 big game hunts this past fall and could tell that it was strategically built for comfort and is tough enough to withstand the most extreme hunting and backpacking adventures.
I love the simplicity of the K4! It has everything you need, and nothing you don’t! After testing the K4 Prototype last year, I was thrilled with the new system to detach the bag from the frame. And the new hipbelt design provides a noticeable increase in comfort.
D
I was ambushed by a mountain lion while packing ~90 pounds of elk out of the Arizona backcountry this December. The K4 pack held the load tight and allowed me to maneuver to defend myself even under heavy load on steep terrain. Simply put, I'm never buying another brand.
I put the K4 pack to the test hunting bull Elk int he Arizona backcountry at over 9000 ft of elevation. The pack's design made carrying my rifle and gear effortless throughout the hunt. I found the water bottle accessory and the quick release rifle carrying accessory to be particularly convenient during the hunt.
Packing the elk out with the K4 was a breeze. The pack's design kept the meat extremely secure while simultaneously allowing me to keep my essential gear with me. The pack was comfortable under heavy load even while descending over 1000 feet of elevation and traversing several miles to get to the nearest forest service road.
I strongly recommend this pack and will be using it for years to come!
C
The best pack I’ve ever owned! American made, and in Idaho nonetheless! There was a lot of thought put into designing these packs! Good work Exo Mtn Gear!
J
I bought my K4 3600 pack system right when they came out in spring 2023. I didn't get much of a chance to use it last year but spent a decent amount of time with it this season and love it. The overall modularity of the entire system, including the new MOLLE panels, is great. I really like how you can set up the bag exactly how you want, and can change it around based on each trip if needed. Any questions that I've had have been quickly and thoroughly answered by the Exo guys. I even had a minor manufacturing defect on my frame that they were willing to take care of a year and a half after I purchased the bag which was awesome. I just added on the 2200 bag, and appreciate the fact that I can use my existing frame to make the pack better suited for day hunts without having to buy an entirely separate bag. The price is definitely up there, but just like many other things you get what you pay for, and the quality is top notch. I'd much rather support a small business with made-in-USA products than something made overseas.
J
I was finally able to put this pack to task on a third season mule deer hunt. The 3600 made the perfect pack for day to day necessities at temps ranging from 22deg-55deg. I was able to take a great deer and the K4 frame distributed the load remarkably. I dropped one hind quarter in the main bag and both shoulders on the load shelf, bone in. The frame/pack kept the load stable and up the canyon we went.
A
This was my first ever elk hunt. Your pack absolutely rocks. I have zero complaints whatsoever. You guys really did your homework on this one. Thanks for an absolutely stellar product and support.
