USMC SealLine Waterproofing Sleep System Compression Sack

Description

This listing is for the Official USMC SealLine Waterproof Compression Sack, a critical component of the Marine Corps' modular sleep system. Engineered by the waterproofing experts at SealLine (Cascade Designs) in collaboration with Skilcraft, this bag is designed to keep your high-loft sleeping gear 100% dry and compressed to a fraction of its original size. Built to survive amphibious inserts, river crossings, and torrential downpours, it is the gold standard for tactical gear protection.

Technical Specifications

• Manufacturer: Skilcraft / SealLine (Cascade Designs, Inc.).
• NSN: 8465-01-574-4003 (System component).
• Material: 210D urethane-coated nylon with high-frequency welded seams.
• Color: Coyote Brown.
• Closure: Roll-top with heavy-duty quick-release buckle and 2-strap compression lid.

Key Features & Design Elements

• Integrated Air-Purge Fabric: Unlike cheap dry bags that trap air, this sack features a specialized waterproof/breathable fabric at the base. This allows air to be squeezed out during compression while preventing any water from entering.
• Welded Seam Integrity: Features RF-welded seams (not sewn) for a molecular bond that ensures the bag remains completely airtight and watertight even under pressure.
• Coyote Brown Finish: Designed to integrate seamlessly with the FILBE rucksack system and current USMC field uniforms.
• Field-Proven Durability: The 210-denier nylon is thick enough to resist punctures from twigs and gear, yet flexible enough to be stuffed into the bottom of a pack.

Condition: Used by our Troops in Great Condition, may have minor cosmetic flaws, fully functional, Overall Great Condition.