Name: Modular Sleep System - ACU
Brand: Forest City Supply
SKU: MSS-ACU-VER
Price: 249.99 USD
Availability: OutOfStock

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From Forest City Supply in Cleveland, Ohio, comes the authentic and complete 5-part U.S. Military issue Improved Modular Sleep System (IMSS) in the ACU / UCP digital camouflage pattern.

This is the genuine surplus system (NSN: 8465-01-547-2757) trusted by the U.S. Army to provide protection in climates ranging from temperate to extreme cold. The genius of the system is its layers, which can be used individually or combined to cover virtually any temperature.

The Complete 5-Part System Includes:

1. UCP GORE-TEX Bivy Cover

The waterproof, windproof, and breathable outer shell. Can be used alone as a minimalist shelter in warmer weather. It features a durable zipper and snaps to secure the inner sleeping bags.

NSN: 8465-01-547-2644
Dimensions: Approx. 80" x 32"
Weight: Approx. 2.0 lbs

2. Patrol Sleeping Bag (Green)

The lighter-weight of the two bags, rated for temperatures from 30°F to 50°F. Perfect for spring, summer, and fall camping on its own.

NSN: 8465-01-547-2706
Temperature Rating: 30°F to 50°F
Dimensions: Approx. 90" x 36"
Weight: Approx. 2.75 lbs

3. Intermediate Cold Weather Sleeping Bag (Black)

The heavy-duty inner bag, rated for temperatures from 30°F down to -10°F. This is your go-to bag for serious cold weather conditions.

NSN: 8465-01-547-2694
Temperature Rating: -10°F to 30°F
Dimensions: Approx. 85" x 35"
Weight: Approx. 4.0 lbs

4. Small & Large Compression Stuff Sacks

Two stuff sacks are included. The smaller sack (NSN: 8465-01-547-2656) holds one bag, and the larger sack (NSN: 8465-01-547-2670) is designed to hold the entire system compressed together for transport.

System Specifications:

Total System Weight: Approx. 10 lbs
Combined Temperature Rating: Down to -30°F (and as low as -50°F with proper clothing layers)

Condition: Photos are for listing purposes only. This is genuine military surplus; condition will be as described in the listing specifics. All components are fully functional.

Trust Forest City Supply for your authentic American-made military gear. This item ships directly from our warehouse in Cleveland, Ohio.

Frequently asked questions

What are my shipping options?

Standard processing is 3–5 business days. Add Skip the Line at checkout for 1–2 day processing. Orders over $200 ship free.

How do returns work?

Unused items in original condition can be returned within our return window — contact us and we’ll get you taken care of.

Is my order protected in transit?

Yes — add package protection at checkout to cover your order against loss, theft, or damage in transit.

Can I track my order?

Absolutely. You’ll get a tracking link by email as soon as your order ships.

Still have a question?

Use the “Ask a question” link on this page or email our team — we’re first responders too and we answer fast.

All Items are Shipped using USPS at this time; unless international orders than UPS.

Available USA Shipping options:

Processing times

Standard Processing: 3-5 days processing USPS

Skip The Line Processing: 1-2 day processing USPS

Available International (non-USA):

Under 1lbs: $40 UPS

1-lbs $70 UPS

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Modular Sleep System - ACU

The Complete 5-Part System Includes:

1. UCP GORE-TEX Bivy Cover

2. Patrol Sleeping Bag (Green)

3. Intermediate Cold Weather Sleeping Bag (Black)

4. Small & Large Compression Stuff Sacks

System Specifications:

Frequently asked questions

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Modular Sleep System - ACU

The Complete 5-Part System Includes:

1. UCP GORE-TEX Bivy Cover

2. Patrol Sleeping Bag (Green)

3. Intermediate Cold Weather Sleeping Bag (Black)

4. Small & Large Compression Stuff Sacks

System Specifications:

Frequently asked questions

5 Year Limited Warranty

Easy Returns & Exchanges