Love this hat, I brought it to Disney with me for when the sun got too intense, it packed in my Lululemon fanny pack perfectly and still had room for chapstick, creditcards, sunglass case, and travel sunscreen. I stuffed it way in the bottom and it always came out flawless, brim always perfect. I also love that the brim flips up and stays up, great for when going in and out of places and on rides where you don't want your vision impeded by a brim, but you don't need to take the hat off completely. Did not mess with sunglasses around ears. I have a big noggin and it is very adjustable. Can't wait to wear it running, I feel it will be perfect.