Modular Sleep System (Improved / ACU)
SKU: 90194568677

Modular Sleep System (Improved / ACU)

Sale price$166.45 Regular price$184.95
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Modular Sleep System (Improved / ACU)This is a genuine US Army surplus 5 piece Improved Modular Sleep System (IMSS), made in the USA by Tennier Industries. Each sleeping bag system contains 5 components, described in detail below: the patrol sleeping, the intermediate cold weather sleeping bag, the bivy cover, and 2 compression stuff sacks. The sleeping bags can be used independently or snapped together into the sleep system, providing comfortable year round sleeping conditions. Snaps

This is a genuine US Army surplus 5-piece Improved Modular Sleep System (IMSS), made in the USA by Tennier Industries. Each sleeping bag system contains 5 components, described in detail below: the patrol sleeping, the intermediate cold weather sleeping bag, the bivy cover, and 2 compression stuff sacks. The sleeping bags can be used independently or snapped together into the sleep system, providing comfortable year-round sleeping conditions. Snaps hold the sleeping bags and bivy cover in place, so they will not move or slide around on you when you're trying to get in or out. Together, the sleep system is rated down to -30° F or -40° F.

We receive these items in bulk from the military and most are in great condition, with some appearing to be like new.  Use the quality guide below to see descriptions of each condition available.  The pictures featured here are stock photos and not of the actual item you will receive, but the actual item is of similar condition and quality. The dimensions of the different components are listed below, and should be considered rough estimations.

Quality Guide

  • Like New - A sleeping bag that appears flawless and never issued or used.  We receive these items in bulk from the military so we cannot say for sure whether or not they are brand new.
  • Excellent - The bivy covers will be crisp and appear to be in the "like new" condition.  The other sleeping bags will be in "very good" condition as described below.
  • Very Good - A sleeping bag that shows very minor signs of use but is in great condition.  No holes, rips, or tears in any of the components.  All zippers, snaps, and drawstrings will function normally.
  • Acceptable - A sleeping bag that will show signs of moderate to heavy use.  Any defects will not hinder the sleeping bag's intended use and would be easy for someone to repair.  There may be one or more small holes in the fabric (most are pin-holes but some may be larger, up to approximately the size of a dime).  All zippers, snaps, and drawstrings will function normally. 

Included Components

Patrol Sleeping Bag - Foliage in color, this mummy-style sleeping bag is rated for temperatures down to 30° F. It features an oversized zipper for easy opening and closing, and snaps for connecting to the other sleep system components. It also features a draft flap over the zipper to prevent heat loss, as well as a drawstring cord around around the hood to seal in even more heat.

Exterior Dimensions, when laid flat:

  • Length: 92"
  • Width, at feet: 24"
  • Width, at shoulders: 37"

Intermediate Cold Weather Sleeping Bag - Urban grey in color, this mummy-style sleeping bag is rated for temperatures down to -10° F. It features an oversized zipper for easy opening and closing, and snaps for connecting to the other sleep system components. It also features a draft flap over the zipper to prevent heat loss, as well as a drawstring cord around the hood to seal in even more heat.

Exterior Dimensions, when laid flat:

  • Length: 87"
  • Width, at feet: 23"
  • Width, at shoulders: 35"

Bivy Cover - The bivy cover is dark grey on the bottom and has an ACU camouflage pattern on the top. It is made with a 3-layer GORE-TEX fabric, making it fully waterproof. It has a zippered closure with snaps for connecting to the other sleep system components. It also features Velcro fasteners around the hood which can be fastened to prevent openings during rainy or extremely cold weather.

Compression Stuff Sacks - The Improved Modular Sleep System comes with a large and a small compression stuff sack, both grey in color. 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90194568677

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Bostonnet
Bozeman, US
★★★★★ 2
poor fit and quality
Color: Brown, Size: Large
Poor quality. You'll get two wears out of it that's it. Material feels cheep and wears cheep.
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Reviewed in the United States on January 18, 2026
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Johel
Cuba, US
★★★★★ 5
Excelente artículo
Es lo que se ve en la foto.
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Reviewed in the United States on September 26, 2025
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Taj
Omaha, US
★★★★★ 3
Booo
Color: Pink, Size: Medium
Way too big for, I'm so bummed because this knit polo long sleeve shirt is way too big, even after I checked the size guide. It's a shame because the material feels pretty nice. I was really looking forward to wearing this. I can exchange it for a smaller size and that was too big. Lol
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Reviewed in the United States on February 19, 2026
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Tamondo
Bozeman, US
★★★★★ 5
Nice Look
Color: White, Size: XX-Large
I love this sweater and everything about it. I purchased for family Christmas photos. I was worried it wouldn't look right or would fit too big. It fitted perfectly and gave me a very casual look. The color is white and not an off white. The quality is good and the fabric durable. It's stretchy so its flexible with your body movements. I highly recommend this sweater I'd you're looking for a light casual look. I recommend pairing with some jeans and a nice pair of boots.
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Reviewed in the United States on April 10, 2026
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Vincent McDonald
Port Orchard, US
★★★★★ 5
Good quality
Color: White, Size: X-Large
For a relaxed fit order true to size. Very nice quality. Value for money. Very soft. I purchased the white, is very vibrant
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Reviewed in the United States on March 31, 2026

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