A Two Season Lightweight Softie sleeping bag PLUS a Three to Four Season Softie sleeping bag which can be used on their own, or zipped together to make an Extreme Temperature bag, using the quick release center zip baffle supplied with the system.

Special Forces System 1 - A quick release center zip version of the Softie 3 with a reinforced foot. Giving two season comfort.
Special Forces System 2 - Based on the Softie 10 this bag is good for 3-4 season use when used on its own.
Special Forces Complete System - Using a unique new center zip-in baffle, the Special Forces bags can be purchased and used on their own or together resulting in an extreme use expedition bag.
Special Forces Centre Zip Baffle - Using a new and unique centre “zip-in” baffle, System 1 and System 2 can be zipped together resulting in an extreme temperature bag.