The Lululemon Black/White/Gray Women's Sports Bra in size 4 is a medium support level bra made of nylon with a blended fabric type. It features a pullover closure and is machine washable for easy care. The bra is designed for activewear occasions with a sports theme, and it has a full coverage cup. It comes in a stylish black, white, and gray color scheme with the brand's logo accents, making it a practical and fashionable choice for active women.