Long-lasting, this cozy matching set is made of 48% modal 48% cotton and 4% spandex. Your child will get custom comfort from the cotton-Spandex cuffs and neck band with stretch memory. With 30 years of parent feedback, they have been thoughtfully designed to meet your high standards and make your kids excited to get ready for bed! Gently snug fitting. Manufactured to the requirements of the CPSC.