SOFT MATERIAL:The boy pajamas is made of high-quality 95% polyester and 5% spandex, which is skin-friendly, super soft, comfortable, and warm without any harm to the kid's skin. The plush is thick and tight and not easy to lint. CLASSIC STYLE:Long-sleeve pajama tops paired with pajama pants.Pants feature covered elastic waistband and allover prints. OCCASION:Whether it is intended to be used in the morning, evening, fall or winter, it is ideal for kid. WASHABLE:This pajama set is machine washable and the color will not fade even after multiple washes. But please do not wash with high temperature and wash with similar color. SIZE:Please refer to the size chart before purchase.