From a hint of glow to a deeper tan, this St. Tropez serum features a quick-drying formula that layers well under makeup or wears effortlessly on its own. From a hint of glow to a deeper tan, this St. Tropez serum features a quick-drying formula that layers well under makeup or wears effortlessly on its own. Proud to be the leading tanning brand chosen by professionals, celebrities, and beauty editors alike, St. Tropez boosts an extensive collection of self-tanning products formulated to help you achieve a streak-free glow. Whether you're looking for the deepest shade of bronze or a light, sun-kissed glow, each easy-to-apply product helps you get professional-grade results at home.