Pineapple Ruffle One-Shoulder Baby Set 95% Polyester, 5% Spandex The material's 'milk silk' feel is a blend of Cotton/Polyester/spandex. The pattern is called "milk silk" a super soft, comfortable, buttery feel material- you will fall in love! Care instructions: Cold wash, gentle cycle, hang dry or tumble dry low inside out, do not bleach, do not iron.