The head and tail lights packaged together in Fortified Bicycle's Aviator Afterburner Anti Theft Boost Combo Pack were inspired by a perceived need for theft proof bike lights. As the implications of being impossible to steal dawned on the former MIT students designing the lights, they realized that the lights would need the durability and battery life to, in the words of Fortified, last forever. Though the lights' alloy bodies are waterproof and nigh indestructible, the real selling feature here remains the theft proof attachment design. The custom bolts securing the Aviator and Afterburner to their respective mounts mean that Joe multi tool can't lift the lights from an unattended bike. Fortified is so confident in the security and durability that it's promised to replace the lights if they're ever stolen and claims that you'll never have to remove them from your bike. For all the focus on longevity, the lights' primary job is to help keep cyclists visible. Both lights' apertures are shaped to allow 180 degree visibility to either side, but they're also lipped on the top to prevent light from shining up into the cyclist's eyes. They also feature different settings to let the low light rider customize either light's output to accommodate variable conditions.