Sunscreen is better than nothing but with clothing there is far better protection for the skin. I use both neck gaiters and sleeves to protect my skin and this are made from thin material that breathes well enough. I don't sweat much from my forearms or my neck.

Black is the best color as it blocks far more of the UV rays (which is why it is black). Second best would be red material. White is the poorest at blocking UV passing through the material and damaging the skin.

Sun sleeves are not unusual for golfers who want to protect themselves. Buy the black ones and ignore the false SPF ratings on the white ones.

When I had a cancer removed from my forehead I noticed in the surgeon's waiting room that all the other men had cancer cells removed from the tops of their ears thank to wearing baseball caps, and the women all had the surgery done on their noses. If you are going to wear a hat buy a real one with a full brim.