This pajama set is made of a cotton and spandex material blend that is lightweight skin friendly and breathable suitable for girls and boys. It is a classic two piece pajama set with a long sleeve button down top and elastic long pants sleeper clothes set for winter and fall keeping your baby cozy and warm. The versatile button front design is suitable for pajama party sleep wear casual loungewear everyday use birthday gift Christmas pajama set and baby and toddler matching pajamas. It is suitable for babies and little boys and girls. The package contains one piece pajama shirt and one piece pajama pants and it is machine washable making cleaning simple and convenient for busy parents while maintaining softness and durability after multiple washes.