Ravers wearing modern phat pants. The reflective properties of the material are clearly displayed.
Phat pants covered in reflective material.
Phat pants or phatties are usually made of denim but can be made of any material, and are fitted at the waist, but get increasingly wider down the legs, covering the feet entirely due to their width. Phat pants are usually worn by ravers and can be used as a visual identifier. Ravers sometimes customise their phat pants by covering them with reflective materials of their own design. The pants are worn at rave parties. Most common phat pants are brands like Kikwear and JNCO (which do not include a lot of reflective materials. Most phats do not have reflective materials.
UV reactive tape is usually sewn or glued onto phat pants. When light (usually UV rays from the sun or black light) hits the tape, the tape absorbs the UV energy and emits visible light, causing the tape to "glow". Many ravers and shufflers who wear phat pants purchase small portable UV lights as they can point it at the phat pants giving them an intense "glow" as seen in some videos on YouTube.[original research?]