Review: Mystery Ranch Bridger 55 Pack | Outside Bozeman。Mystery Ranch Bridger 55 backpacking pack. This has a harness that is a women’s size XS/S. These are interchangeable harnesses so if you have a different size you can swap it out! This pack has all the bells and whistles and they are not making them anymore. Used on one overnight and is in like new condition. Get yourself a part of mystery ranch history before the brand is gone for good from the outdoor space. Super super comfortable and highly adjustable this is an incredible pack! I’m just downsizing my collection before I move.dimensions in last photo.