Stretchy, soft and made with a double layer of bamboo material. It has a knotted top you can adjust to fit different sizes of newborn heads, and is hemmed with a triple zig-zag stitch for the perfect stretch to fit over those tiny little heads. They also have washable leather tags for the perfect finishing touch. ***SIZE CHART*** Fits an average newborn head size. [Remember, they are stretchy.] *** CARE INSTRUCTIONS *** Wash on cool/warm. Tumble dry low or lay flat to dry for best results.