One size fits most, stretchynVery soft, lightweight u0026amp; comfy, super breathable and fashionable, suitable for all seasons and occasionsnNot like the regular, it is open top as picture shows, makes a very cute and special design, dual use(cap and scarf)nYou can pull your ponytail thru the opening if you need to, or you can leave it closed and wear it like a traditional capnGreat for both nomal person or anyone dealing with chemotherapy or hair loss or to cover you hair for modesty, religious reasonsnVery soft, lightweight u0026 comfy, super breathable and fashionable, suitable for all seasons and occasions. Not like the regular, it is open top as picture shows, makes a very cute and special design, dual use(cap and scarf). You can pull your ponytail thru the opening if you need to, , or you can leave it closed and wear it like a traditional cap. Great for both nomal person or anyone dealing with chemotherapy or hair loss or to cover you hair for modesty, religious reasons.