USGI BLACK LARGE SEALLINE BAG USED

The USGI Large Black SealLine Waterproof Compression Stuff Sack is genuine U.S. military issue gear, built by Cascade Designs (SealLine) under a SKILCRAFT contract for the Lighthouse for the Blind of Seattle. Designed to keep a sleep system, spare uniforms, or bulky soft goods bone-dry and packed down tight, this is the same dry sack issued to U.S. troops for keeping mission-critical kit protected in the field — from amphibious operations to wet-weather bivouacs.

This is the large size, sized to swallow a full military sleep system or a bulky load of clothing and gear. The roll-top closure with dual side-release buckles creates a watertight seal, while the twin one-way purge valves on the base let trapped air escape so the load compresses down to a fraction of its original volume — a huge space-saver inside a ruck or duffel. Reinforced webbing carry handles at the top make it easy to sling, hoist, or lash to a pack frame.

Who It Sells To

• Hunters, backpackers, and kayakers who need a proven, heavy-duty dry sack
• Preppers and bug-out builders assembling waterproof kit modules
• Military surplus collectors and veterans looking for issued gear
• Airsoft, milsim, and reenactor players kitting out authentic loadouts
• Boaters and paddlers who need a rugged waterproof compression bag for gear on the water

Key Features

• Genuine U.S. Government Issue — SKILCRAFT / SealLine (Cascade Designs) contract build
• Waterproof roll-top closure with dual side-release compression buckles
• Twin one-way purge valves on the base to bleed off air and compress the load
• Heavy-duty coated fabric with welded, taped seams for a reliable seal
• Reinforced webbing haul handles for carrying, lashing, and hoisting
• Large capacity — sized to hold a full military sleep system or bulky gear load
• Matte black low-visibility finish

Condition

Sold as used, previously issued military surplus. Bags show honest field-use character — creasing, scuffs, and light wear consistent with service. Markings and printed use instructions may be faded. Each bag is a real piece of issued kit, not a copy, and delivers the authenticity collectors and end users look for.