Measuring 54″X10″ the Springfield Armory Waterproof Rifle Case is made from 500D PVC material paired with weathertight water resistant zippers.
Springfield states the Exterior Shell has a Waterproof Rating of IP 67 (immersion up to 1m). They also claim it will float and since it’s lined with removable foam padding, I don’t doubt it. Just to be safe, I’d just count on this rifle bag being weatherproof rather than waterproof, based on the terminology Springfield uses.