Buried Alive 2.0

Avalanche rescue tech evolves faster than the iPhone. The latest American-made innovation: a portable air bag. Here, the life-saving gadgetry and the right time to use it.

Backcountry Access’s new Float 30 backpack houses a rip cord–triggered air bag that protects your head and helps you stay on the surface ($499; backcountry access.com).

Now a tried and trusted technology, the Black Diamond AvaLung II diverts stale air, extending your oxygen supply ($130; blackdiamond equipment.com).

The Ortovox S1 locator is easy to read and great for multiple burials (ouch). Ninety percent of victims survive if found within 15 minutes ($499; ortovox.com).