USMC SealLine MACS Sack
The USMC SealLine MACS Sack is a genuine Marine Corps-issue waterproof compression stuff sack developed by Cascade Designs for the USMC 3-Season Sleep System. Constructed from 210D oxford nylon with a polyurethane coating, it uses a DrySeal roll-down closure and a one-way purge valve to keep contents dry while compressing bulky soft goods down to a packable size. The 9-liter body holds clothing, electronics, optics, documents, or a compact sleeping bag, and it floats when sealed. Carries NSN 8465-01-542-7688 and earns a USMC Level 2 water resistance rating — a solid choice for field use, kayaking, hunting, and backpacking.
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- SKU
- 8465-01-542-7688
$15.95
Description
Features
- Genuine USMC Issue — Built by Cascade Designs/SealLine for the US Marine Corps 3-Season Sleep System under NSN 8465-01-542-7688.
- 9-Liter Capacity — 549 cubic inches of internal volume, sized at 7 in (18 cm) diameter by 13 in (33 cm) height when loaded.
- 210D Oxford Nylon Shell — High-tenacity polyurethane-coated 210-denier oxford nylon stands up to hard field use and abrasion.
- DrySeal Roll-Down Closure — Dual-strip roll-top seal locks out water, dust, and grit while keeping the contents secure.
- Level 2 Water Resistance — USMC-rated Level 2 water resistance shrugs off rain, splash, and brief submersion.
- One-Way Purge Valve — Low-profile flexible valve compresses bulky soft goods like clothing and sleeping bags by venting air without letting moisture back in.
- Buoyant Design — Floats when sealed, so dropped gear stays on the surface during river crossings or boat ops.
- Lightweight at 3.3 oz — Adds minimal weight to a ruck or assault pack while still delivering full waterproof protection.
- OD Green Colorway — Subdued olive drab finish blends with standard-issue military and outdoor kit.
- PVC-Free Construction — Built without PVC for cleaner long-term use and storage.
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Very HappyPackaged well. For the price this MACS Sack is a great value.
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Very SatisfiedCost is excellent and shipping was speedy.
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Rapid ProcessingI bought this MACS Sack to try and the US Army quality is great.
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Perfect ProductReceived in two days after placing my order. Will be back to buy from Keepshooting again!
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This MACS Sack is as pictured.Packaged well. For the cost this MACS Sack is a tremendous value.
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