DeSoto Women's Shield Del Sol Long Sleeve Tri Top We always recommend you wear sunscreen underneath these products. It is crucial to keep in mind that a sunscreens SPF/UPF rating refers only to its ability to protect skin from UVB radiation. Because we know that UVA damage can be just as insidious, it is essential for the health of your skin that you use a sunscreen that contains the UVA-protecting ingredients of titanium dioxide, zinc oxide, and/or avobenzone.