Special Fabric: 95% Polyester and 5% Spandex. Two piece pjs sets made from soft and breathable fabric. Loose fit, good sewing, great for sleeping, casual wear or lounging around the house or yard all day. Size: X-Small=US 8(US 5-6 Years); Small=US 10(US 6-8 Years); Medium=US 12(US 8-11 Years); Large=US 14(US 11-13 Years); X-Large=US 16(US 13-15 Years). Design: Button down shirt, short sleeve, 3pcs casual sets, chest pocket, lapel collar, matching with a long pajama pants and shorts, elastic waistband, casual loose fit. Boys girls pajamas sets featuring comfortable and breathable fabric for your kids! OCCASION: Breathable and lightweight button down shirt ensures maximum comfort throughout the night, Perfect for bedtime, sleepovers, and cozy evenings at home. The children satin sleepwear sets is perfect for daily wearing, sleeping, playing, bathing and lounging indoor and outdoor. Best gifts for daughter, son, granddaughter, grandson, close friends, ect as birthday gift, Christmas gift and other present. Washing: Please wash separately to avoid fading and dyeing. Machine washable. After cleaning, please hang it to dry and do not expose in the sunshine. Do not bleach.