One sleep system. Four seasons. Military proven.
The USGI Modular Sleep System (MSS) is one of the most respected military sleeping systems ever produced. Designed to keep American warfighters operational in environments ranging from mild spring nights to extreme winter conditions, the MSS remains a favorite among campers, hunters, bushcrafters, overlanders, and preparedness enthusiasts.
This complete system includes all three major components:
✔ Patrol Sleeping Bag
✔ Intermediate Cold Weather Sleeping Bag
✔ Gore-Tex Bivy Cover
Each component can be used independently or combined to create a versatile sleep system capable of adapting to changing weather and terrain.
The lightweight Patrol Bag is ideal for mild temperatures and summer camping. When temperatures begin to drop, the Intermediate Cold Weather Bag provides significantly increased insulation. Combine both bags inside the waterproof Gore-Tex Bivy Cover and you have one of the most capable field sleep systems ever issued by the U.S. military.
Unlike many commercial sleeping bags, the MSS uses synthetic insulation that continues to provide warmth even in damp conditions. The Gore-Tex bivy adds a waterproof and windproof layer that helps protect against rain, snow, condensation, and ground moisture.
Whether you're building a bug out kit, heading into the backcountry, setting up a hunting camp, or looking for reliable military surplus gear, the USGI MSS continues to be a benchmark for durability, versatility, and performance.
At Better Bushcraft, it's one of our favorite surplus sleep systems because it simply works.
What's Included
Patrol Sleeping Bag
Designed for warmer weather and mild conditions.
• Lightweight military sleeping bag
• Synthetic insulation retains warmth when wet
• Adjustable hood and draft protection
• Compresses for easier transport
Intermediate Cold Weather Sleeping Bag
Built for colder temperatures and harsh weather.
• Heavy-duty synthetic insulation
• Excellent cold weather performance
• Compatible with Patrol Bag and Bivy Cover
• Military field proven design
Gore-Tex Bivy Cover
The outer shell that ties the entire system together.
• Genuine Gore-Tex waterproof membrane
• Windproof and breathable construction
• Protects against rain, snow, and moisture
• Heavy-duty military specification build
Why We Like It
The MSS gives you options. Run the Patrol Bag in summer. Use the Intermediate Bag during colder months. Combine everything when conditions get nasty. Instead of buying multiple sleeping bags for different seasons, the MSS adapts to your environment and mission.
