The long sleeve shirt thread made me think about something else. My father has been doing this for over 30 years. In those 30 years he never wore sunglasses. A couple years ago his eye site went down hill. He went in and got checked out and he had cataracts. The doctor told him his are solely caused by sun exposure. Had he been wearing quality sunglasses he wouldn't have gotten cataracts. He has had them fixed and he now wears quality protective sunglasses. His eyesight is also back to 20/20 like it used to be. For you long haulers do yourself a favor and get yourself a good QUALITY pair of sunglasses! I myself require a prescription so I bought myself a nice pair of Oakley prescription sunglasses.