Does anyone know where I can find SPF clothing for adults?
I have purchased ladies blouses at REI. I recently saw some at Costco at a "road show" display, it was athletic wear like rashguards, leggings, and fitted zip jackets. Probably most large sporting goods/outdoors type of stores would have some since we need the protection when out doing things like hiking, boating etc.
REI has a large selection on the website, if you don't live near one of their stores.
TravelSmith, L L Bean, and ExOfficio all carry both sunscreen and bug repellant clothes. However, the protection in both washes gradually away, over 30 or so washings. So I don't think it's worth the extra cost.
Read this. People in hot countries have been wearing clothing to protect themselves from the sun for 100's of years. See what works.