I'm after a shower-resistant rucksack/backpack (is there a difference?) to use as an everyday bag with a one-yr old, so it needs to hold his changing mat and stuff, snacks, water and bits and bobs, as well as my wallet, sunnies, phone etc. Ideal capacity would be 18-20 litres.
It needs to open via a front zip, rather than with a drawstring or similar at the top, so I can easily see what's inside and get to the bottom.
I like the Kankens, particularly their shape and tote handles, but ideally I want a separate pocket or two inside. Cath Kidston do a similar one but I'm not very keen on the prints - I'd prefer a more muted, plain colour.
Any suggestions very gratefully received!