Snugpak Special Forces Sleeping Bag Expanda Panel BlackThe Expanda Panel is a fantastic way to add extra space to all the Snugpak UK made Special Forces modules. It gives an extra 40cm of space at the chest and around 7cm at the foot. The extra space allows you to keep the bag zipped up whilst giving you extra room to relax, where normally you might have to unzip your bag. The Expanda panel also allows you to control the internal temperature of the bag. If the conditions are warmer than expected, using