This shirt is the best.  I have had pre cancerous growths removed, a family history of skin cancer and on top of it cannot wear sunscreen because of allergies.  I was advised by my derm to just stay out of the sun.  This is not an option with two young kids.  This shirt keeps the sun at bay and is very cool on a HOT day.  More so than just wearing a tank top because it keeps the sun off the skin and lets any breeze in.  Life saver!  The only useful note I would add is that I did order a darker color and the material seemed to be more textured and thick than the lighter colored versions of the shirt.  I sent it back and purchased a white one and it is HEAVEN to the touch!