We used them while swimming and snorkeling in Hawaii. And on a subscooter. It kept my phone dry and took great photos and videos underwater. Underwater cameras are also not required. We've also used it to secure our car key, ID and card on the beach and in the water. We had card sleeves, but they weren't 100% dry like a dive box. The car keys are the only thing we forgot and this worked great to keep them safe.
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