This serum has a smooth, non-greasy texture. From May to September, I used two bottles (the main product and the refill) as part of my evening skincare routine on days when I was concerned about the sun's rays, applying it to my face, neck, and arms (and legs if I was outside in the hot sun for a long time). During the day, I use sunscreen everywhere except my legs, and arm warmers with UV protection to protect my arms. I'm prone to sunburn, so I still get sunburned, but I feel like the damage has been reduced. I used to be bothered by the difference in tan between the inside and outside of my arms, but that difference has become smaller, and the outside color quickly returns to the same tone as the inside. I also feel like my face and neck don't burn too much. This will likely become a summer essential.