The watch cap is a style that's existed for well over 100 years, though it's most commonly associated with WWII US Navy personnel. Eco-cotton is a blend of reclaimed cotton fibers from reclaimed garments & discarded cutting table scraps. Not only do these hats contain a percentage of recycled PET bottles but zero dyes or chemicals are used in the process of creating such vibrant colors from textile waste. Details 75% Upcycled Cotton / 20% Recycled Nylon / 5% Other Fibers 100% Upcycled Yarn Manufactured with No Water No Dyes 50% Solar Powered Factory Made in the USA SourceKnit in New York Size InfoOne SizeLength: 11-12" Inches (without fold) Washing InstructionsSpot clean by hand as needed. Lay Flat to dry. Note: Knit cotton is prone to stretch so if it is a little tight when you receive it, just a little wear will allow the cap to adjust to your head. If you feel the cap starts to feel too loose over time, you can give it a hand wash in warm water, lay flat to dry & it should spring right back.