Multi-day trips usually have one disadvantage - if we want to sleep outdoors, we must be equipped for that. We need to have a sleeping bag and mat and usually also a small tent. Yes, we can sleep under the stars, but when it starts to rain, it is not the best experience. It all depends on the conditions. Either way, we will need water and other things. Where do we put it ? Into the larger backpack. Medium size backpacks could be limited by a volume of 25-50 liters. Such volume have requirements for the backpack itself so let´s talk about them. 

What fits is good enough 

Medium size backpacks, around 25 - 50 liters, are called three-days backpacks. According to army standards, such backpack should fit things for three days, including food. Everyone knows, that things for three days will have some weight, especially when we also carry water. Yes, with heavier weight we will need more supporting features. Back padding with appropriate ventilation will serve great for its purpose. Together with hip belt can distribute the load from the back to the hips. Chest strap helps to keep shoulder straps at place. It might seem to be petty things, but the opposite is true. None of us wants to imagine a situation we get into with a wrong backpack.

Reliable and waterproof 

Another thing we will be interested in, is the backpack´ resistance to water. Thanks to the modern materials with additional coatings, we can achieve great results. We need to realize, that the backpack will be with us in the nature for several days and that is why it needs to be well protected. A big bonus is an additional rain cover, which covers the entire backpack to ensure the perfect protection against rain.

How to choose ? 

The most important thing is, that the backpack fits perfectly. Put it on your back, adjust all the straps and see how it fits. The straps are highly important. The backpack should always have hip strap as well as chest strap. Everything must fit and do not push or pull. Pay attention to interior organization too as it plays important role as well. Once again, the backpack must stay on place and not moving, which ensures stability.