Abstract Mono

I'll be interested to see who knows what this is. 
No doubt it will be obvious to some but I wouldn't have had a clue.

I had my first swim today after missing several weeks due to a bad cough. I never really want to go but it feels so good afterwards.
Then I bought a new winter jacket on a good sale. I'm glad I didn't wear it down the street this afternoon. It was so cold I would have thought it was no good, but it was just the weather. Fine, but only 4C.