Custom AthletiPacks have the option to be constructed with waterproof materials and zippers. Note that our Waterproof packs are not submerge proof; in the event complete submersion is possible. it is recommended to put electronics in a waterproof clear container (i.e a phone case or sealable plastic bag) as a 2nd layer of protection. All other options have a Durable Water Resistant(DWR) coating which makes the pack highly water resistant.