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The waterproof clothing bag is intended to be a carrying bag providing waterproof protection for rations, extra clothing, personal effects, and the intermediate cold and extreme cold sleeping bags. It is not constructed to withstand rough use or handling. Should the area of operation or assigned function involve rough handling and waterproofing is required, the waterproof bag should be placed inside a bag of more rugged construction such as the duffel bag to prevent the waterproof bag from damage that would result in leakage.

The field pack liner is intended to be used as a liner for field pack to hold items other than subsistence items that must be protected from moisture. The liner is also intended as a flotation device for the individual carrying the field pack.

After Action Reports from Operations Iraqi Freedom and Enduring Freedom demonstrated a compelling need to provide a waterproof bag to protect personal gear from the elements, rain, sand, snow, and moisture. The Marine Corps Stuff Sack will provide Marines a better method of waterproofing and sorting their personal gear stored inside the ILBE packs.

The purpose of the waterproofing bag insert/liner (WPI) is to keep clothing and equipment dry when the ILBE main/assault pack is exposed to prolonged rain or water submersion during field use.

The 3 season sleep system (3S) is a single sleeping bag system that is lighter in weight and provides increased environmental protection for all environments except extreme cold weather.

The Extreme Cold Weather Sleep System (ECWSS) will provide environmental protection between +40°F and -45°F (+5°C and -46°C) and is intended to be used with the foam sleeping mat.

The Intermediate Cold Weather Sleeping System is an ICW version of the extreme cold weather sleeping system.

The Modular Sleep System is designed to insulate the user in environments ranging from mild weather to extreme cold weather.

Commercial item description A-A-55262 covers a modular sleeping bag system that consists of a patrol sleeping bag, an intermediate cold weather sleeping bag and a compression stuff sack to carry the complete system.

Military specification MIL-S-44429 covers a complete intermediate cold weather sleeping bag system.

Purchase description GL/PD 07-09 covers a modular sleeping bag system that consists of a patrol sleeping bag, an intermediate cold weather sleeping bag, a waterproof bivy cover and two compression stuff sack to carry the components of the system.