The Access Bag is designed to add quick accessibility and cubic inches to any Stone Glacier bag. The Access attaches and detaches quickly via the same compression strap buckle configuration of both bags. The buckle layout is approximately 10 percent smaller than on Stone Glacier Packs to maintain a tight fit and adequate compression to the back of the bag. Whether it is a spotting scope, rain gear, or other daily necessities, the Access Bag will live up to its name with a full center zip access. The Access Bag also has one interior spotting scope sized, vertical pocket.