One Frame for Every Hunt

At Stone Glacier, we think you should be able to customize your gear to suit every hunt—whether it’s a quick morning rip close to home or a weeklong expedition above the timberline. We also believe you shouldn’t have to buy a different pack system for every hunt. That’s why we design and build our hunting packs with modularity in mind, meaning that once you buy a Krux or Xcurve frame, you have the option to switch out any Stone Glacier bag to fit any hunt. Likewise, all of our bags can expand or compress to adapt to the hunt.

Hunter packing antelope in hunting pack

Frames Are the Foundation 

A serious load-hauling pack starts with a solid foundation. Many of our customers own one SG frame with a smaller bag for day hunts and a larger expedition-sized bag for backpack hunts. Once you have a frame, you can shop our bag-only options to add options to your pack system.

We’ve spent more than a decade testing, designing, refining, and building our pack frames that meld ultralight, ultra-quiet, and highly durable materials. The result is a nimble, versatile workhorse that can be used interchangeably with any Stone Glacier pack to comfortably and efficiently haul everything a mountain hunter needs.

We make two frames to fit distinctively different body types: the Krux Frame features straight carbon stays and generally fits shorter torsos (19” and under) and flatter backs better while the Xcurve features curved carbon stays and generally fits people with a more pronounced curve to their back. If you're unsure of which frame will fit you best, we highly recommend contacting our customer service team for assistance. If you bought a pack and the fit doesn’t feel right, no problem; contact customer service and we’ll get you taken care of.

We know that hauling gear and meat can be enjoyable misery, and we design our packs to be lightweight, comfortable, and as strong as an ox. Our frames are constructed using four carbon composite stays that provide an ultralight, ultra-strong combination that transfers the load evenly to the hip belt. This engages your legs, which increases your efficiency. It also relieves strain on your lower back, which increases your comfort level. With increased efficiency and comfort, you’ll be able to hike farther and hunt harder in rugged terrain.

Load-Hauling Capacity 

When we tested our final pack frame design, we loaded more than 300 pounds into a pack. No signs of stress, damage, or failure were detected. Every SG frame is rated to 150 pounds, and we have complete confidence that our packs are capable of hauling as much as you can pack. 

hunter hauling moose in hunting pack

At the heart of the Krux and the Xcurve is the integrated Load Shelf, which allows you to expand the bag off the frame to pack gear or meat in between the bag and the frame. Because our packs are modular, you can remove the bag entirely and use just the pack frame and Load Shelf to haul meat off the mountain. The Load Shelf and back of all of our bags are also made with durable X-Pac fabric, which has a waterproof layer built into it. This means that blood won’t seep from the meat into the bag and all over you and your gear. 


The Xcurve and Krux frames are compatible with every Stone Glacier bag (with the exception of our R3 Military Pack line), from a 2800-cubic-inch day pack (Approach) to a 7900-cubic-inch expedition pack (Sky Guide). And there are plenty of packs that fall between. We want you to pick the right setup for your hunting style.

Swapping out bags on a frame is a cinch:


  • Approach 2800: 1 lb. 8 oz.
  • Solo 3600: 1 lb. 8 oz.
  • Evo 40/56: 1 lb. 9 oz.
  • Col 4800: 1 lb. 11.8 oz.
  • Sky 5900: 2 lbs. 7 oz.
  • Sky Archer 6400: 2 lbs. 7 oz.
  • Sky Talus 6900: 2 lbs. 11 oz.
  • Sky Guide 7900: 3 lbs.

The Terminus Series includes the only packs in the Stone Glacier fleet with the bag sewn directly to the frame. It was designed specifically for ultralight, expedition hunts and features a Load Cell (not a Load Shelf), which is used to pack out the boned-out meat on sheep, goat, and mountain mule deer hunts. The 2200 cubic inch internal Load Cell positions the meat next to the frame and closest to your center of gravity. The design leaves 4800 cubic inches of usable space on the Terminus 7000 and 6500 cubic inches of usable space on the Terminus 8700 to load your gear for the pack out. Two drain holes in the bottom of the main bag prevent blood from pooling inside the load cell.

Versatile Compression 

We took the concept of a modular gear system and made it even more adaptable by adding numerous compression straps and buckles to both the frames and bags. These straps allow you to adjust the size of any pack based on your load. For instance, if you have a multi-day pack like our Sky 5900, you can use it as a daypack or a 4,300-cubic-inch overnight pack. If you’re heading into the backcountry for a weeklong hunt, extend the pack to full volume at 5,900 cubic inches with the Sky Lid. For the pack out, extend the Load Shelf straps and add another 2,500+ cubic inches. 

We know our customers have a wide array of hunting styles and hunt across a broad range of environments and terrain. Because our bags and frames are interchangeable, you don’t need to look any further than our website to build your pack system to suit your hunts. Find the frame that fits, and over time, you can add bags to your pack arsenal—or use just one bag for everything. Either way, you can hunt with absolute confidence in your pack’s ability to excel on any hunt you haul it on.