Rock Stuff Sack

11 reviews
$14.95 Weight 0.13 oz / 3.7 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.


  • Made in the USA.

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 DSM’s 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 our sustainability initiatives.

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
5.0 Based on 11 Reviews
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  • prefect size
  • overmitts
  • buffalo wool gloves
  • limb
  • choice
  • carabiner
  • sand
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  • dirt
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ST
09/13/2022
Sean T.
United States United States

Rock Stuff Sack

Works great! Simple yet innovative time saver.

JH
10/26/2021
jason h.
United States United States

Great little rock sack

Great idea for a product. You can fill it with rocks or sand/dirt and easily and throw over your limb of choice. When stuffed it's about the size on a tennis or baseball, perfect size for throwing, When not it use it's prefect size to stuff the 50ft. cord for throwing/hanging your bear bag and a carabiner. The Dyneema fabric is very tough and abrasion resistant so should last a long time but also easy to fix with tape if it does tear. And like all of Zpacks products it's super light!!

TH
10/08/2021
TIm H.
United States United States

Nifty sack.

Excellent construction holds my buffalo wool gloves and waterproof breathable overmitts.

TS
01/21/2021
Tyler S.
United States United States

Beautiful customer service

They gave me green to match the food bag I've already bought!!!! I love it, the best customer service is one that fix and help customers before they knew they wanted it. Zpacks is the greatest.

SB
09/15/2020
Sierra B.
United States United States

good product

rock stuff sack is lightweight and made with sturdy material to hold potentially abrasive and heavy material