They are often used for a "one-day" only tan, or to complement a DHA based sunless tan. Many formulations are available, and some have limited sweat or light water resistance. Most will create some light but visible rub-off onto snug clothing. Therefore they should not be applied under clothing, or where fabric and skin edges meet. Dark clothing will prevent the rub-off from being noticeable. While these products are much more safe than tanning beds, the color produced can sometimes look orangey and splotchy if applied incorrectly. 100% Herbal Instant Tan is not orangey or splotchy because it doesn't use chemicals which cause other lotions to not mix well and cause results you can't control. 100% Herbal Instant Tan is a natural bronzer which will show up only on very fair light skinned individuals who don't already have a natural tan or fake tan.
A recent trend is that of lotions or moisturizers containing a gradual tanning agent. A slight increase in color is usually observable after the first use, but color will continue to darken the more the product is used.
Air Brush tanning is a spray on tan done by a professional. It can last five to ten days fading with every shower. It is used for special occasions or to get a quick dark tan. At-home airbrush tanning kits and aerosol mists are also now available.