The world's largest waterproof bike bags have plenty of space for everything you need. The Back-Roller Pro Plus is the XL version of the popular Back-Roller Plus touring bag. With a volume of 70 liters per pair.
A more minimalist design is hardly imaginable: the Light-Pack 25 is the lightest of the waterproof ORTLIEB backpacks. With a 25-liter payload and a weight of only 290 grams, the Light-Pack 25 offers an optimal weight-to-volume ratio.