I have a strong sensitivity to the sun so we'll see how they work. You are on the skinny side. You can see through if you look through the back of the shirt in the light, but the blue shirt I bought gives the room a blue tint. So it's not entirely transparent. There are thicker, less transparent UPF shirts on Ebay than this one. But this shirt is no worse than the typical polyester shirt.
Van Heusen Traveler Stretch Men's Shirt
47 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
INFLATION Bamboo Shirts Sleeve Elastic Men's Clothing in Shirts
45 Review