Reapplication is the biggest unsolved problem in sun protection. Almost nobody reapplies sunscreen, and the main reason is makeup — you are not going to rub lotion over a finished face at 1 p.m.
A powder solves that, and this one solves it well. It brushes on over makeup, cuts shine, and adds real zinc oxide. A layer of this at midday is much better than the nothing that most people apply.
Talc-free and fragrance-free, with ceramides added to offset the drying feel powders usually have.
Used for its actual purpose — a top-up over sunscreen you already applied — it is a genuinely useful product.