The Aircontact Ultra 50+5 backpack from the deuter brand will get you in the first place. It has a low weight, an easily adjustable back system and a comfortable ergonomic lumbar pad. You won't want to take it off at all. The backpack includes practical loops and variable straps for attaching GPS, maps, mats or a tent. You will also certainly welcome the possibility of removing the upper adjustable lid, thus reducing the overall weight of the backpack. And that is useful. Pockets for a wallet, mobile phone or a comb that peeks out like a dude. There are really many of them on the Aircontact Ultra backpack. Pocket in the upper lid , on the waist belt, stretchable on the sides and in the front. So you have somewhere to store a drinking bottle, a windbreaker, as well as hygiene items including a comb. And if that's not enough, you can simply increase the volume of the backpack by up to 5 liters.