The Exped Torrent 50 serves me on the boat as protection for water-sensitive stuff and is ideal for transporting the boat, paddles, pump (hangs externally on the backpack) and other accessories. However, it can't really be closed, which is not a problem for me. ( https://www.hajk.ch/fr... for long distances I use this Outwell Balos (30kg) whereby the quality of the rubber "tyres" seems rather poor to me.