trainers (sneakers) and badges with logos of favorite metal bands were popular among metalheads, and musicians of heavy metal and speed metal bands. However, by the mid-1980s the success of the glam metal scene had influenced the style worn by many mainstream metal fans. In addition to the traditional denim and leather look, mainstream heavy metal bands began to dress in more bright, colourful and theatrical clothing similar, in many ways, to the glam rock look of the 1970s. This included items such as spandex, platform boots, leg warmers and many different types of often spiked or studded leather accessories. In addition to this the long hair popular with metal fans was often worn teased. Makeup became popular with many metal bands as well often worn onstage for theatricality however many bands also began wearing makeup offstage also. The mainstream glam metal image of the mid- to late 1980s was often criticised by many underground metal fans as being too 'effeminate'. The mainstream glam metal (later called 'hair' metal) style would decline during the later half of the decade but would remain popular until the grunge movement in the early 1990s. In the second half of the 1980s, the original denim and leather clothing style was popular among musicians and fans of more extreme and niche (often underground) metal bands – thrash metal, crossover thrash, early black metal, and early death metal bands. It was popular particularly in the United States, but there were also large regional scenes in Germany, England, Canada, and Brazil. Although these styles of extreme metal would begin to adopt contrasting images during the ensuing decade. By the late 1980s, acid-washed jeans and denim jackets had become popular with both sexes. Acid washing is the process of chemically bleaching the denim, breaking down the fiber of material and forcing the dye to fade, thus leaving undertones of the original dye evidenced by pale white streaks or spots on the material. This became associated with the afformentioned heavy metal trend (called "hair metal" in later decades for the large frizzy coiffures worn by both male and female enthusiasts). Severely bleached and ripped jeans, either manufactured purposely or done by hand, become a popular fashion trend, being a main component of glam metal music acts such as Poison. The Japanese equivalent of glam metal, known as visual kei, emerged during the mid- to late 1980s and incorporated punk,