Roll-top bags dominate the world of commuter backpacks as they offer better water-resistance compared to bags with zips. Because no one wants to arrive at work with soggy clothes to change into.
Made from a thin but tough waterproof material (without any harmful PFAs) and with taped and sealed seams, the Amager will have no problem keeping its contents dry. The kit on the inside that is. There are straps and loops on the outside to hold your helmet, two velcro loops for a lock and some fixed straps that you could hook smaller items too.
