The US military UCP Modular Sleep System (MSS) is a four-part sleeping system designed for use in a wide range of environments. It provides layered insulation and weather protection, from mild conditions to extreme cold. The system can be configured in multiple combinations depending on climate and mission requirements.

• Pattern: Universal Camouflage Pattern (UCP)
• Components designed to work together for modular layering
• Provides coverage from mild to extreme cold weather conditions

This set will come with:
1 × UCP bivy cover
1 × Modular patrol sleeping bag
1 × Modular intermediate sleeping bag
1 × Small stuff sack
1 × Large stuff sack

Issued as the standard U.S. Army and Marine Corps sleep system during the UCP uniform era.