The US military BDU Modular Sleep System (MSS) is a four-part sleeping system designed for versatility in a wide range of climates. It combines layered sleeping bags with a bivy cover for protection from cold and wet conditions. The system can be configured for mild weather or extreme cold by combining components.

• Pattern: Woodland BDU camouflage
• Components designed for modular layering and insulation
• Suitable for environments ranging from temperate to subzero

This set will come with:
1 × BDU bivy cover
1 × Modular patrol sleeping bag
1 × Modular intermediate sleeping bag
1 × Compression stuff sack

Issued as the U.S. Army and Marine Corps standard sleeping system during the Woodland camouflage era.