The Softie® Expansion sleeping bags have a unique expanding system called the EEP (Elasticated Expander Panel), this allows the user the option to make the bag wider when required. You can do this to give yourself more room to move or to help cool the bag allowing you to regulate your body heat for a more comfortable night’s sleep. Specification Weight: 2300g / 81oz Packsize: 32cm x 26cm / 13" x 10" Temperature Rating Comfort: -15°C / 5°F Temperature Rating Low: -20°C / -4°F Origin: Imported Highlights Built-in deployable side baffle, to allow for more room Adjustable length via foot shorting clips Incredibly soft thermal suede foot lining Built-in LED torch Elasticated drawcord-adjustable hood Internal valuables pocket with hook & loop Two-way side zips with insulated baffle behind Anti-snag zipper webbing tape Supplied with a compression stuff sack for easy compact carrying Hanging tabs on the foot to allow easy airing and drying Fabrics & insulation Outer Fabric: Paratex Micro, 100% Nylon Inner Fabric: Paratex Light & Reflectatherm, 100% Polyester  Insulation: Softie®, 100% Polyester