Volume, weight, carry system, how the space is divided, gear loops and so on. Every type of pack has something. And none has everything.

Documents, money. Clothes, electronics. Digital data. On the road you have to be ready for anything – and think ahead. Here are tried-and-tested tips from the field.

Low weight matters. But on its own it's no silver bullet – it has to go hand in hand with durability and with how well the pack carries.

Packs have loads of different loops and straps. We'll show you how to use them to carry poles, a helmet and other kit.

The winter mountains always have a surprise in store. Find out what to pack so you can deal with problems or, better still, prevent them.

A pack that doesn't fit is a pain. But usually it isn't the pack's fault. What matters is setting up the whole harness system properly.

You'll get the best pack when you choose one that suits your activity and understand how each of its parts works.