BlockerLite Compression Dry Sack

Compressing a sleeping bag or puffy jacket down to the smallest possible package without sacrificing waterproof protection is the whole game for ultralight paddlers and backpackers. The SealLine BlockerLite Compression Dry Sack handles both jobs at once, wrapping featherweight 20-denier silicone and polyurethane-coated nylon around your most compressible gear and squeezing out every bit of dead space.

The Continuous Compression system is a meaningful upgrade over conventional compression sacks. Rather than pulling straps that stress the seams, it encircles the sack entirely, distributing load evenly and preserving long-term durability. The PurgeAir valve works alongside it, venting trapped air after the roll-top is sealed so the sack compresses down further than the closure alone would allow. It's more reliably waterproof than breathable fabric membranes and holds up better over time.

The roll-top closure uses a built-in stiffening strip for a consistent, wrinkle-free seal, and fully welded seams back up the whole system. The flat-sided rectangular PackTight shape nestles cleanly against other gear in a kayak hatch or pack, packing up to 20% more efficiently than rounded sacks. For canoe trippers and kayak tourers running tight on space across Canadian backcountry routes, that efficiency is worth having.

• Material: 20D silicone and polyurethane-coated nylon
• Compression: Continuous Compression system encircles sack to minimise seam strain
• Valve: PurgeAir one-way waterproof air vent
• Closure: Roll-top with wrinkle-free stiffening strip
• Seams: Fully welded for waterproof durability
• Shape: Flat-sided rectangular PackTight design
• Packing efficiency: Packs 20% more efficiently than rounded sacks
• Use: Kayak touring, canoe tripping, backpacking, ultralight travel