Going for a run or ride early in the morning or late at night is fun. But it can be dangerous if you are not visible to drivers. 4id founders, Ron Biron and Rodger Bailey, have come up with PowerSpurz and PowerArmz light bands to keep you visible at night. These bands slip on easily and do not add a whole lot of extra bulk. You can wrap the Spurz around the heels of your sneaker or the Armz around your bicep, and you are set.
These wearable safetly lights are weatherproof. You just need two coin batteries to keep them going for 80-100 hours. Pretty interesting inventions if you ask us.