I bought this when water got into my existing rucksack. British hills can drop serious rain and I wanted something that would keep my kit dry. This fits the bill. Plenty big enough for a weekend out, but it rolls down into a manageable day pack. It is comparatively light and doesn't get any wetter in the rain. MH is a fairly expensive brand, but Rock and Run had this for a very keen price.I am well satisfied and ready to face the Scottish winter!