Does what it says in keeping you from being burned, but it fits weird. I wear a Med in most tops and ordered the Large in this one. Across the hips it's very snug and it bunches up below the collar bone and above my boobs because of that. I have to keep tugging the top half down. The arms are very snug as well.  Coverage starts at mid-neck which is good. All in all a comfy shirt that blocks the sun and dries quickly. Picture doesn't help much but it shows the color and the tight sleeves.