I used it only once when it was sunny! I haven't used it in the rain. It was stored in the car, so there is a little dirt on the bottom of the bag. Please check the fourth picture ( . .)" There were no stains on the umbrella itself. 100% shading rate, UV cut rate, and blue light cut rate, UPF50+ All colors have a 100% shading rate, UV cut rate, and blue light cut rate, UPF50+