Working on a high speed ferry I was lost driving at 30k. These glasses give me sun protection and vision into a setting sun, combined w sharp radar n plotter monitoring w a slight up tilt of my head. The 2.0 is enough at that distance even though I am a 2.5, and the glasses are super light. They sit well on my face ( sone glasses make me twitch to hitch them up). Tiny negative is that I can “see” the nose bridge between my eyes. I will definitely get a spare pair as losing the first set really effected my ability to do my job properly. Thanks!