Coach Jenny's Halloween Challenge Arm Warmers are versatile smart sleeves that can be rolled down as the weather warms up. Made of Nylon and Spandex, the stretchy seamless knit fabric will wrap around your arm without feeling constricting. They are also UV resistant. One size fits most humans, from the most muscular man to the most diminutive woman. Black with white screen print. Images are shown on mannequin forms.