your trail sunglasses from melon optics. melon optics combines the expertise of zeiss, years of experience on the mountain and a lot of pure insanity to give you a goggle with maximum performance while looking better than all the rest!the kingpin uses zeiss' experience in lens manufacturing to offer you a choice of interchangeable, shatterproof lenses that are suitable for all conditions.these sunglasses are made of super flexible, super hard tr90. the rubberised temples and soft nose piece provide ultimate comfort.