You will absolutely love these distressed messy bun hats. They give that broken in, comfortable feel the very first wear. They have a cotton/mesh back with a slot for your pony tail, so you can then create the perfect messy bun! These messy bun hats are one size with a velcro back to adjust. They are great for your outdoor adventures, everyday wear, or that "I woke up like this hair" on those days you "can't even."