You don’t have to be a SCUBA diver to need a waterproof phone: A city downpour or even a steam-filled bathroom can wreak havoc on sensitive electronics. Yet most waterproof cases are too bulky for comfort. The solution? LifeProof. Priced at $80, the ultra-thin iPhone case seals out water, cushions against shocks — and is just as sleek and trim as the phone itself.

Weighing in at just 1 ounce, LifeProof cases (available for iPhone 4 and 5 models) are a half-inch thick — similar in size to sleeves that merely protect the screen from scratches. And it’s sturdy, with a promised that your iPhone is protected even if you drop it from a height of 6 feet. It also seals out dust, snow and water (submergible for 30 minutes, to a depth of 6 feet). Want to listen to tunes during your swim workout? Just screw in an underwater headphone adapter ($20, sold separately) and plug in with a pair of waterproof ear buds.

A tiny window of optical-quality glass over the camera lens keeps photos sharp. You can even use the video function underwater, to capture scenes while snorkeling. Speaker ports let sound out (without admitting water in), so you can still hear the ringer and put callers on speakerphone. And a range of solid colors — from electric orange to genteel black — lets you customize your look.