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SealLine Blocker Compression 20L Dry Sack

sku# 148531
SealLine - Blocker Compression 20L Dry Sack
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Product Info

The SealLine Blocker Compression 20L Dry Sack is a safeguard against one of the worst feelings ever: digging into a stuff sack for a change of clothes only to find a soggy clump of blah. There's just no reason to risk that mess if you're able to snag one of these. This sack is lightweight, compresses well, and keeps your gear dry. You can take your chances or you can take this sack. The choice is yours.

Product Details


70D Polyurethane-Coated Nylon


5.5 x 10.4 x 18.8" / 14 x 26.5 x 48 cm

Weight5.9 oz / 170 g


Waterproof ClosureRoll-top closure features a wrinkle-free stiffening strip to ensure a secure seal when closing the dry sack.

Versatile MaterialsLightweight 70D polyurethane-coated nylon materials are a tougher, more resilient cousin to the ultralight BlockerLite materials. More durable and versatile, these materials are great for all-around use with confident waterproof protection.

Smarter CompressionUnlike conventional systems that pull against seams, the Continuous Compression system encircles the sack to minimize seam strain, maximizing durability for dependable protection.

PurgeAir™ ValveThe unique and waterproof PurgeAir valve vents trapped air, helping the dry bag compress further after being sealed, and is both more durable and more reliably waterproof than waterproof/breathable fabric membranes.

Durable ConstructionFully welded seams result in stronger and more durably waterproof construction compared to sewn-and-taped seams.

Efficient PackingPackTight™ packing system sacks feature flat-sided, rectangular shapes that nestle closely together, packing 20% more efficiently than rounded sacks for easy, space-saving organization.


  • Material: Nylon, Polyurethane (PU)
  • Bag Volume (L): 20
  • Bag Volume (cu in): 1220
  • Weight (g): 170
  • Warranty: Limited Lifetime



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