SealLine Blocker Compression Dry Sack 5057-867
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SealLine Blocker Compression Dry Sack

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Really. If it's not up to snuff after you use it (a couple times) you can still bring it back.

It lasts longer than 30 days, but not forever. We'll be fair about it.

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Show Description

Efficient packing and a no-H2O zone. These tough bags have a purge valve to vent air and keep them compact. The rectangular shape creates less dead air space inside your pack, kayak or cycle touring panniers.

  • Made from lightweight yet durable 70-denier polyurethane-coated nylon.
  • Fully radio frequency welded seams create a stronger and more durably waterproof construction than sewn and taped seams.
  • One-way PurgeAir valve vents trapped air while remaining waterproof so you can compress the bag.
  • Internal roll top closure is easy to use and seals tight.
  • 4-strap Continuous Compression system encircles the bag to minimize seam strain while still letting you compress your load.
  • PackTight shape features flat-side rectangular shapes that nestle close to together so there's less wasted space.

Tech specs

Show Tech specs
  • 100g (5L)
  • 120g (10L)
  • 170g (20L)
  • 200g (30L)
Ideal for
  • Camping and hiking
  • Cycle touring
  • Travel
  • Watersports
Closure Roll-top and lid
Material 70-denier PU-coated nylon

Fair: made of lightweight materials and designed to be carried inside another bag. Good: strikes a balance between light weight and durability. Excellent: made of heavy duty materials and designed to be carried alone. Exceptional: made of ultra-tough materials and designed to withstand abuse.


Waterproof bags and cases are made with waterproof materials and have waterproof closures. Some are designed to be submersible. Water-resistant bags and cases are made with waterproof materials, but water could sneak in through the seams or closure.

Submersible No
  • 30cm (5L)
  • 36cm (10L)
  • 48cm (20L)
  • 58cm (30L)
  • 16.5cm (5L)
  • 21cm (10L)
  • 26.5cm (20L)
  • 30.5cm (30L)
  • 9cm (5L)
  • 11cm (10L)
  • 14cm (20L)
  • 16cm (30L)
IPX rating

Indicates the degree of protection against liquid. IP X1: Dripping water while in normal operating orientation; IP X4: Splashing water; IP X5: Water jets; IP X6: Powerful water jets; IP X7: Immersion up to 1m ≤ 30 minutes; IP X8: Suitable for submersion as specified by manufacturer.

Not IPX rated
  • 5L (5L)
  • 10L (10L)
  • 20L (20L)
  • 30L (30L)
Additional feature(s) Compression straps
Made in China