I can’t believe this Saturday is the first day of autumn. But according to the EPA UV index widget, my zip code still had a pretty high UV index today: 6. So don’t go thinking that you can put away the sunscreen just yet (or ever). I’m still slowly working my way through Sephora’s Sun Safety Kit, and today’s post will focus on a chemical sunscreen: Murad Invisiblur Perfecting Shield SPF 30 Sunscreen.

Lately I’ve noticed that some products advertise SPF protection, but only contain one active ingredient: titanium dioxide. Why is that a problem? Because titanium dioxide only protects against part of the UV spectrum—specifically, UVB and UVA2 rays. It does not protect your skin from UVA1 (340–400 nm) rays, according to this table from the Skin Cancer Foundation.

You know I have a thing for sunscreen lip balms. If it were up to me, all lip balms would contain sunscreen in them by default. What’s not to like? You get to moisturize your lips and protect them from harmful UV rays in one go. But it’s not always easy to find a sunscreen lip balm that gives you everything you’re looking for: the right color, the right moisturizing properties, the right SPF protection.