Black Sunflower Lace Ruffle Baby Romper 95% Polyester, 5% Spandex The 'milk silk' feel of the material is a blend of Cotton/Polyester/spandex. The pattern is referred to as "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.