
The case has a nice rubber seal and closes tightly. The buttons work great with the action camera. Place the tissue in the case and then in a wide-mouth glass filled with water. Shake the jar very vigorously several times a day. After 24 hours I removed the case, dried it and opened it. The fabric was dry as bone. I only snorkel so I'm sure I'll be fine. I don't know how the pressure of deep diving affects it. I tested my Osmo underwater and made sure it's waterproof. Even if a few drops get into the camera, everything is fine. This is a great case and at only $16 (July 2021) it's a great deal too! Leave the closet door open when not in use. If you block it, the rubber seal will be compressed and can damage the seal.

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