It’s never a bad idea to wear a helmet while riding a bicycle, but their bulk makes them hard to carry after you’re done riding, and this makes it unappealing for many. To make your life easier, The Fend helmet is able to fold down to 1/3 of its original size, kind of like an accordion. Its proprietary hinge means it won’t collapse in case of an accident, and is designed to exceed all US CPSC and European EN1078 Safety Standards. It features excellent ventilation and a plush interior liner for added comfort. A $79 pledge will get you a helmet of your own, with expected shipping in May 2017.