Ultimate Resilience: The Military Surplus MSS Modular Sleep System
Stay warm, dry, and mission-ready with the US Military Surplus Modular Sleep System (MSS) — the ultimate in military sleeping innovation. Manufactured by Tennier Industries, this cold weather sleep system offers unmatched versatility, durability, and performance for current and former military operators, outdoor adventurers, hunters, and preppers alike.
MSS Sleep System Components: Military-Grade Comfort
The Modular Sleep System includes two interlocking sleeping bags and a rugged, waterproof bivy cover. Each element is designed for flexible use depending on mission needs and weather severity:
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Patrol Sleeping Bag
Rated for temperatures down to 30°F.
NSNs: 8465-01-547-2706, 8465-01-547-2757 -
Intermediate Cold Weather Sleeping Bag
Handles temperatures from -10°F to 30°F.
NSNs: 8465-01-547-2694, 8465-01-547-2757, 8465-01-445-6274, 8465-01-398-0687 -
Bivy Cover
Waterproof, breathable protection against rain, snow, and wind.
NSNs: 8465-01-547-2644, 8465-01-416-8517
When combined, the MSS provides effective insulation and protection in environments as cold as -40°F for up to 4 hours. Compact and lightweight, the system packs down easily into a stuff sack, making it ideal for tactical mobility and expeditions in diverse environments.
Weather-Resistant Bivy Cover for Maximum Protection
Crafted from waterproof, breathable materials, the included military-grade bivy cover shields you against rain, snow, and wind without trapping moisture inside. Whether you’re facing damp jungle conditions, desert nights, or high-altitude snowfields, the MSS keeps you operational and ready to move.
Product Feature List:
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Made in the USA by Tennier Industries.
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Complete military sleep system: Includes Patrol Bag, Intermediate Cold Weather Bag, and Weather-Resistant Bivy Cover.
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Cold weather performance: Suitable from -50°F to 50°F temperature range.
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Waterproof and windproof bivy cover for all-weather protection.
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Lightweight and portable: Includes compression stuff sack for easy carry.
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Highly adaptable for all environments: jungle, desert, alpine, and field conditions.
What Comes in the US Military Modular Sleep System (MSS)?
The complete USGI Modular Sleep System (MSS) includes four components:
- Patrol Sleeping Bag (mild weather use)
- Intermediate Cold Weather Sleeping Bag
- Waterproof and windproof Gore-Tex® bivy cover
- 9-strap compression stuff sack
The 9-strap compression sack allows the entire system to be compacted for transport and secured to a rucksack or vehicle kit. Each component may also be used independently depending on climate and operational needs.
How Cold Is the Military Modular Sleep System Rated?
When the Patrol Bag and Intermediate Bag are layered together inside the bivy cover, the MSS is rated down to approximately –40°F (for limited exposure under proper conditions).
Its modular design allows insulation to scale with the environment — from mild summer conditions to extreme cold weather operations.
Is the MSS Bivy Cover Waterproof?
Yes. The issued bivy cover is waterproof, windproof, and breathable.
It protects against rain, snow, and wind while allowing internal moisture vapor to escape, helping reduce condensation buildup during extended field use.
How Much Does the Complete MSS Sleep System Weigh?
The complete Modular Sleep System weighs approximately 10 pounds when packed with all components.
The included 9-strap compression sack reduces bulk and keeps the system secure during transport, making it practical for rucksacks, vehicles, and deployment gear loads.
Is the Military Modular Sleep System Good for Camping?
Yes. Originally issued for military deployment, the MSS is widely used by:
- Campers
- Hunters
- Preppers
- Survival instructors
- Tactical operators
Its layered construction provides adaptable, field-tested durability that often exceeds many commercial cold-weather sleep systems in the same price range.
Condition Guide – USGI Modular Sleep System (MSS)
All MSS sleep systems are inspected under our 4-Point Grading System before listing. Because this is genuine military-issued gear, normal signs of field use may be present depending on grade.
Premium Condition
- Near-new appearance
- Strong loft and insulation retention
- Fully functional zippers and hardware
- Minimal to no staining or fading
- Ideal for CIF replacement or long-term use
This grade is best for customers who want the cleanest possible surplus system.
Very Good Condition
- Light cosmetic wear from normal field use
- Insulation remains effective with strong loft
- All components intact and fully functional
- Minor markings or inconspicuous repairs
A strong balance between condition and value.
Good Condition
- Visible signs of field use
- Possible minor fabric wear, fading, or holes small repairs
- Fully functional zippers and components
- Insulation remains serviceable
Best suited for camping, survival training, or budget-conscious buyers.
Fair Condition
- Heavier wear
- Possible staining, fading, rips and tears,
- Shows significant use
- Repairs needed
Best for those who are handy and can make repairs.
Important Notes
Because this is authentic USGI military surplus:
- Color shades may vary slightly due to contract batches.
- Name tapes or unit markings may occasionally be present.
- All systems are inspected to ensure functional performance before shipment.
If you need a specific condition for CIF replacement, contact us before ordering and we’ll help you select the right grade.
