Pasties (singular pasty or pastie) are patches that cover a person's nipples and areolae, typically affixed with adhesive. Though pasties are commonly associated with strippers, burlesque shows and erotic entertainment, they are also, at times, worn as an undergarment, beachwear, or as a form of protest during women's rights events such as Go Topless Day. Pasties come in a variety of colors, shapes, and sizes, typically not much larger than the areola. Pasties are usually applied with a special tape or glue fixative, often gum arabic. However, in some situations keeping pasties from falling off can be an issue, as can be their removal. Some people are allergic to some adhesives or pastie material. Due to this, most high quality pasties are made of hypoallergenic silicone and use special adhesives to reduce the chances of an allergic reaction. Some pasties are for single-use, while others are washable and can be reused.