15 L Foldable Backpack, Ultralight Waterproof Daypack for Folding, Small Hiking Backpack for Men and Women, Walking Rucksack Daypack, Hiking Foldable Hiking Backpack for Travel (black) : Amazon.co.uk: Sports & Outdoors
Ortlieb Commuter City Petrol 21 Litre Waterproof Daypack