They were plain grey and did the job. I could run in them all week then stick them in the wash with the rest of my running kit, no problems.
But a couple of years ago the hat started to get a bit thread bare. I'm a bit sad about that. It was a good hat. But I considered myself a runner now so how hard could it be to replace it?
So I knitted myself one. I can't say if it will shrink yet, but it's machine washable yarn so I think it'll be ok. Of course it's a bit warm for a hat right now, and I'm off running for a bit with a foot injury, but I'm sure I'll find out once it gets cold again.
Rather than keep it plain grey I added a little bit of detail with a yellow stripe. I like it. I might try some other colours next.