For such a necessary, and sometimes expensive, piece of outdoor equipment, sunglasses are very fragile. They get stepped on, shoved into back pockets, and ground into gravel when you face-plant going down a hill. Portland, Oregon-based Revant Optics‘ premium performance frames are completely modular. Each of the lenses, frames, and rubber parts are American-made and replaceable, making them a pair of sunglasses that will last as long as you need. The S1Ls are its ultralight frames. They’re bike-helmet-compatible and allow plenty of ventilation for the toughest outdoor sports.