This article compares two popular makeup setting sprays: Urban Decay’s All Nighter and Charlotte Tilbury’s Airbrush Flawless. Both products promise long-lasting, 16-hour wear and are waterproof, with the added benefit of hydrating and blurring from Charlotte Tilbury's spray. The author, who uses both regularly, tests them during a summer heatwave to see which performs better throughout a day of commuting, work, and socializing without reapplication. Urban Decay’s All Nighter is noted for its reliability on oily skin, while Charlotte Tilbury’s spray enhances glow and hydration. The test evaluates factors like smudging, patchiness, and overall staying power under high temperatures.