Crashes happen. If you're participating in any helmet sport, you'll want the ICEdot Crash Sensor. Mounted on your helmet, the tiny device detects an impact and automatically launches an app on your phone that pings your emergency contacts with your coordinates. Of course, if you're unharmed, you can cancel the alert. [$149; icedot.org]
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56 Perfect Things
Tech, Tools, Toys, & the Hottest New Gear
Plus: The Deadly Thrill of BASE Jumping
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