Small Pack Liner Dry Bag

$39.00 Weight 1.4 oz / 40.0 g


Lead Time Ships in About 1 Week

This roll top dry bag protects the entire internal contents of smaller backpacks up to around 40L in size. This is a good option if you prefer to use non-waterproof stuff sacks instead of individual dry bags. It is also nice as an extra layer in very wet environments.

It is sized to fill out the main compartment of any of our smaller backpacks like the Nero, Sub-Nero, Co-Conspirator , or any other backpack with a similar volume. 

  • Constructed from black 1.0 oz/sqyd Dyneema® Composite Fabric which is inherently waterproof and abrasion resistant. By comparison our regular Stuff Sacks are made from thinner .55 oz/sqyd material.

  • Fully taped seams. Our dry bags will keep water out in typical backpacking conditions where the bag is not submerged.

  • The top of the bags seal with stiff velcro to make closing and rolling the top easy! Air can escape from the rolled velcro, allowing these to squish flatter in your backpack as more gear is piled on top.

  • 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.

Flat Dimensions: 17" wide x 32" tall (43 cm x 81 cm)

Full Dimensions: roughly 6" x 11" x 25" (15 x 28 x 63.5 cm)

Volume: Around 1650 cubic inches (27 Liters) - Fills the main body of our 40L and smaller backpacks.

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.



1.0 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 oz/sqyd Dyneema® Composite Fabric has a thicker membrane giving it more abrasion resistance. We use it for dry bags and tent floors.


Tensile Strength:
 104 lb/in (911 N/5cm)

Puncture Strength: 3.5 lb (15.5 N)

Water Resistance: 20,000 mmH₂O

Made in the USA.