Great Multi Purchase Bag
After many attempts to find the perfect bag, this is it! I find it really useful for city breaks and field trips as it has so many zipped compartments I can keep stuff safe, while having good easy access to a large compartment in which I can keep field guide, notebook, snacks, etc. There is also a bottle-sized open pocket on one side which is great for hot days out. The material seems robust and I expect it to last a long time. I think it is water resistant rather than waterproof but I keep a waterproof cover (from a small rucksack) in a little compartment under the handle. It is so good a friend of mine has just bought one exactly the same.