Setting sprays don’t exist in a vacuum, so wear time often varies from person to person. And while product descriptions may say 16 or 12-hour wear, that may vary due to differences in skin type and the products used underneath your setting spray.
That said, it looks like 16 hours is where most setting sprays max out. Users can find that kind of wear length with Urban Decay’s All Nighter Setting Spray, MAC’s Fix + Stay Over Alcohol-Free 16Hr Setting Spray, and Charlotte Tilbury’s Airbrush Flawless Setting Spray, just to name a few.