- Weight (on medium R3 Frame): 5 lbs. 11 oz.
- Capacity: 5900 cubic inches / 96 liters
- Capacity with R3 Lid & Side Bags: 7400 cubic inches
- Cubic inches in Bivy Mode: 4300
- Fabric: 500D Cordura (bag), Xpac (load shelf)
- Heavy duty YKK #10 Zipper
- Heavy Duty 1" Duraflex military approved buckles and webbing
- 150+ pound load rating
- R3 lid-compatible
- R3 Side Bag-compatible
- Berry Compliant
- Compatible with R3 Lid (included)
- Top Velcro access for radio antenna and or comms cable
- Two internal Velcro loop patches
- Compatible with SG Camp Pocket, Swing Out Pocket, and other modular attach pockets
- Side stretch pocket for quick external storage
- Full top panel zip for access to main compartment
- Top external zipped pocket
- Belt attachment compatible
- Hydration Compatible (Hydro Sleeve - Sold Separately)
- Made in the USA
The R3 5900 gives operators a highly versatile, lightweight pack that can execute light-and-fast, one-day missions in Bivy Mode or instantly extend into a multi-day pack capable of five+ days by deploying the expandable 2,500 cubic inch load shelf. Integrating the R3 Side Bags further extends the 5900’s capabilities for extended missions that require more equipment or bulkier cold-weather gear.
Stone Glacier - Waist Belt Sizing
- Small belts are measured 28" - 30"
- Medium belts are measured 31" - 36"
- Large belts are measured 37" and above
Stone Glacier - Proper Pack Fitting
When fitting a Stone Glacier Pack, there are three things we look for in a perfect fit. (A) First, we always want the belt centered on the tip of your hip bone. Belt positioning can be altered by adjusting the attachment height of the shoulder straps. (B) Next, we want to make sure the shoulder straps make solid contact with the backside of our shoulders. (C) If a gap is present between the shoulder strap and shoulder, it often can be eliminated by loosening the load lifters. Lastly, we want to aim for the color transition on the shoulder straps (D) to land on, or close to, your collarbone. Placement can be altered with a combination of adjusting the attachment height of the shoulder straps on the frame sheet and loosening of load lifters.
Learn From the Best
SG Founder and Lead Designer Kurt Racicot walks us through how to properly fit a Stone Glacier backpack.
