USMC Improved Modular Sleep System

Leave it to the Marines to truly improve the old Modular Sleep System. They started by re-thinking the waterproof bivy cover. They made it front opening and added a generously sized opening supported by wire to stand off of your face and covered in mosquito netting.  Overview Operation Enduring Freedom (OEF) After Action Reports identify a compelling need to provide Marines with a sleeping bag that increases protection from environmental conditions while reducing weight and volume. OEF Marines carried only the modular patrol bag during mountain operations to decrease weight and volume but provided inadequate protection in the cold mountainous environment.  3 Season Bag System Features • The system includes a sleeping bag, bivy cover, waterproofing compression stuff sack at a total weight of 4.8 lbs as a 10% weight reduction with improved protection. • The system Increases temperature by 15 degrees to protect at 20 deg F and above for wet and dry conditions for 4 hours uninterrupted sle