The product is a pair of Women's Sparkly Black Leggings by Serena Williams, featuring a zipper detail on the back leg. These leggings are designed for dance performance, with a solid black color and a touch of sparkle. The size is regular and medium, and they are perfect for women looking for stylish and functional activewear. The zipper detail adds a unique accent to the leggings, making them stand out in a dance setting.