This set is 100% cotton, sewn with cotton thread. There are no synthetic fibers whatsoever in this garment. Elastic waistband and pockets on the shorts make these great for lounging at home, the beach, or park. The matching top has a loose fit with high slits for comfortability and movement. The subtle patterns are created with Shibori. Details: Shorts are xs/s, fits sizes 0-4 One of a Kind 100% Cotton Dyed in Denver, CO Handwash or machine wash in cold or room temp water. Tumble dry on low.