Modular Sleep System - ACU

U.S. Military Improved Modular Sleep System (IMSS) | 5-Part UCP Set

Prepare for any environment with the complete, genuine U.S. Military Improved Modular Sleep System (IMSS). Sourced by Forest City Supply, this is the authentic 5-part set (System NSN: 8465-01-547-2757) trusted by the U.S. Army to provide comfort and protection in temperatures ranging from warm summer nights to extreme arctic cold.

The genius of the MSS lies in its layers. By using the components separately or combining them, you can create the perfect sleep system for any condition. Use the green Patrol Bag for cool nights, the black Intermediate Bag for serious cold, or snap them both together inside the waterproof GORE-TEX bivy cover for a system rated to protect you in sub-zero temperatures. This isn't just a sleeping bag; it's a comprehensive, all-weather shelter solution.

Whether you're a year-round camper, a serious backpacker, or a prepper building a reliable bug-out kit, this is the ultimate sleep system. Stop buying a new sleeping bag for every season and invest in the one system that does it all.

The Complete 5-Part System Includes:

UCP GORE-TEX Bivy Cover

• NSN: 8465-01-547-2644
• 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.

Patrol Sleeping Bag (Green)

• NSN: 8465-01-547-2706
• 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.

Intermediate Cold Weather Sleeping Bag (Black)

• NSN: 8465-01-547-2694
• 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.

Small Compression Stuff Sack (Foliage Green)

• NSN: 8465-01-547-2656
• Designed to hold either the Patrol or Intermediate bag individually for more compact packing.

Large Compression Stuff Sack (Foliage Green)

• NSN: 8465-01-547-2670
• This larger sack is designed to hold the entire system (Bivy Cover, Patrol Bag, and Intermediate Bag) compressed together for transport.

System Specifications:

• Total System Weight: Approx. 10 lbs

• Patrol Bag Weight: Approx. 2.75 lbs

• Intermediate Bag Weight: Approx. 4 lbs

• Bivy Cover Weight: Approx. 2 lbs

• Temperature Ratings:

  • Patrol Bag: 30°F to 50°F

  • Intermediate Bag: -10°F to 30°F

  • Combined System: Down to -30°F (and as low as -50°F with proper clothing layers)

Trust Forest City Supply to deliver this complete, genuine, and field-proven American sleep system right to your door.