faq
The greyer caps come in one adjustable size designed to fit most head sizes. No sizing chart is needed — simply put it on and adjust the fit for your comfort.
Do you have a sizing chart for head fit?
My head doesn't fit the hat. Do you have a larger option than the standard size?
How will the hat pair with my phone?
What kind of battery is in the hat?
Can the battery be replaced?
Can I get this hat through TSA with the battery in it?
How long do I have to return the hat if I don't like it?
What is the required iOS version for compatibility with the app?
Why no Android app? Is one in development?
Can I pair the hat to my computer?
Tips on cleaning the hat?
What’s the warranty?

