A spray tan is a cosmetic treatment that provides a temporary tan to the skin without sun exposure. It involves applying a fine mist of tanning solution, which typically contains dihydroxyacetone (DHA), a colorless sugar that reacts with the outer layer of the skin to create a bronzed appearance. Spray tans are popular for their quick application and immediate results. The process can be done at salons or with at-home kits, and it usually takes just a few minutes. Results can last from several days to a week, depending on skin type and aftercare. Regular exfoliation and moisturizing can help maintain the tan longer.