New, unopened, unused: This is a hydrating self-tanning serum to visibly boost your skin from the outside in. Suggested Usage: -Exfoliate and moisturize dry areas in advance. -Glide serum on with a mitt for best results, using the light golden sheen to guide application and ensure no missed patches. -Tan will subtly develop over 4-8 hours. -No need to rinse. -Exfoliate and moisturize regularly to prolong your glow.