The backpack is indeal for me because I drive every day by bicycle to work and so my luggage was always there. The size is just right for my needs. There are enough subjects available to stow everything. The rain cover protects the backpack in bad weather very well and you can also to dry completely then remove. I have the same one at that bought for nighttime driving an LED taillight, because you can very cleverly behind rank Lemmen it and in addition to the reflector is still on. I would also take no smaller. The 30 liter capacity braucht`s already. So overall my side buy recommendation!