Comfort breeds confidence, and we feel nothing but both going on long trips with the Big Agnes' Parkview 63L backpack. They formed a frame back panel and shoulder straps so so that they anatomically correspond to our body that is, they follow our shape and fit better so a complete set will not feel like a complete set. Besides its already large volume allows you to add an additional 10 liters if we need it. Whether it's three, five or even seven days in the forest Parkview will suit us.