Sun-In Tropical Breeze Hair Lightener gives your hair the look you ve been wanting. Sun In is the fast easy way to beautiful lighter hair. Just spray it in. The heat of your blow dryer or the sun does the rest! Sun In Salon Out. Sun In starts working with just one application. And it s easy - just spray it in and let the heat of the sun or a blow dryer do the work! There s no easier way to a lighter brighter look. It is alcohol-free and made with natural extracts.