When we go camping from Friday to Sunday we fill the Bridger 55L backpack. Its capacity is ideal for those two-day hikes where we can fine tune the load. The Bridger features an Endurance Yoke with an internal spring steel frame for an ergonomic back fit. It puts the weight right on us so we won't be hunched over in pain at the end of each day. We like it that it has double access from the top and front, so we can take that what we need, without having to comb from top to bottom.