The rubber coating helps keep it safe from Water (though I don't know that it is considered officially "waterproof". I don't know what else to say except that it is the perfect companion for the digital photo enthusiast!!Great case This is a great Memory Stick case, which I use to tote memory sticks around for both my digitial camera, and movie camera.
It's thin, sits well in camera bag pockets. It's also not hard to remove the sticks, as they tilt up when the "bottom" is pressed.
Given the postage each way, it's not worth it to me to return this one and get the other, but I probably should have gone with the other Sony model, made of durable but lightweight plastic.
Its very cheap protection for six or eight hundred dollars worth of memory sticks. And, you'll impress other Sony users with your coolness. HINT: makes a cheap present for those friends!