Rock Stuff Sack

$14.95 USD Weight 0.14 oz / 4 g
Lead Time Ships in 1-3 Days

Great, durable rock sack. Don’t waste time trying to tie string around a rock. Perfect for storing cord, too. Keeps bears safe!

– Alex D., ★★★★★

Make bear bagging easy with this rock sack. Just put a small rock, sand, or gravel in it, tie your bear line to it, and toss it over a branch. Constructed from ultralight but durable 1.6 oz/sqyd Dyneema® Composite Fabric to resist abrasion and punctures.

This is also available as part of a Bear Bagging Kit .

Need a different size? Check out the rest of our Stuff Sack collection.

  • Constructed from 1.6 oz/sqyd Dyneema® Composite Fabric which is thicker and stronger than our other stuff sacks to resist abrasion and punctures.

  • Stuff sacks can easily be patched with Dyneema® Composite Fabric Tape.


  • Also check out our Dry Bags for a slightly heavier, but more abrasion and water resistant way to protect your critical items from the elements.


  • All Zpacks gear has a two year limited warranty against defects in materials or workmanship. Please see our return / warranty policy.

Full / Closed Dimensions:

2.5" x 2.5" x 2.5" (6.5 cm round)

Made with Bio-Based Dyneema® Fiber

Reduce your carbon footprint with bio-based Dyneema® fiber technology. Sourced from renewable, bio-based feedstock, it is the first ever bio-based ultra-high molecular weight polyethylene (HMPE) fiber. Commit to sustainability and help reduce our reliance on fossil fuel resources and rely on the trusted performance of the world’s strongest fiber™. Click here to learn more about Bio-Based Dyneema® Fiber.

Made in the USA.



1.6 oz/sqyd Dyneema® Composite Fabric

Dyneema® Composite Fabric is composed of high strength Dyneema® fiber laminated inside a polyester membrane. It is inherently waterproof and does not require any coatings or DWR treatment. Dyneema® Composite Fabric has very high tensile strength for its weight and does not stretch.


1.6 oz/sqyd Dyneema® Composite Fabric has a thicker membrane and a higher Dyneema® fiber count. This fabric weight has excellent abrasion and puncture resistance.


Tensile Strength:
 210 lb/in (1840 N/5cm)

Puncture Strength: 5.2 lb (23 N)

Water Resistance: >20,000 mmH₂O

Made in the USA.
Customer Reviews
4.9 Based on 15 Reviews
5 ★
93% 
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4 ★
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T
08/02/2024
Trevor SVG verified by SHOP
United States

Durable, lightweight👍

RC
05/28/2024
Rebecca C.
United States

Replacement Rock Stuff Sack

Well...thought I lost my original Rock Stuff Sack, but just misplaced in plain site. So....using this extra sack to store my Flex Tail Zero Pump. Perfect size and keeps everything in one tidy place. :)

W
12/07/2023
Westa SVG verified by SHOP
United States

Lightweight & helpful hanging near bag

GW
11/24/2022
Greg W.
United States

Rock bag

This is my second rock bag from Zpack. I wore out my first on the AT in 2021. This new one is the same quality except that it did not have a carabiner loop. I sewed one on.

ST
09/13/2022
Sean T.
United States

Rock Stuff Sack

Works great! Simple yet innovative time saver.