The x plorer is a great combination of a dry bag and a rucksack the tough tear resistant waterproof material is closed with a reliable roll top making it ideal for a wide range pursuits includiong cycling motorcycling climbing and canoeingthe anatomical design of the fully adjustable shoulder straps and sternum support make it comfortable to wear and reflective strips keeps the visibility high when it is not in use the x plorer simply rolls up for easy storage it weight next to nothing an