This is a fast pattern for a cosy neckwarmer made from a soft yarn – Wendy Mode Chunky. It takes less than 1 skein and can be made up in 1 evening. There are instructions for the button closure and an alternate strap.
Get the pattern here on Ravelry.
If you’d like to buy one of the button closures instead of making one, they are in my etsy shop here – Button Closure