Giro aeon helmetyou wanted a lighter helmet a cooler helmet a better helmetso we created one starting with a full roster of our best features we optimized every component in the aeon including the shape of the helmet itself reducing weight by 28 percent compared with its predecessor we also sculpted massive vents with interior channelling for best in class cooling power and integrated the adjustability and comfort of roc loc 5 for a luxurious feel with all the performance you need featu