Team up your suit with a white shirt or a grey roll neck or turtle neck jumper for colder seasons. (theidleman.com)
I'm not sure when I decided it was a good idea to start dressing like a sack of rocks or that trying to choke myself on a half - assed turtle neck jumper would be fun but don't worry, I'm just as confused by this outfit as you are. (shannonvalle.space)
ZARA, for exampe, offers basic turtle neck jumpers for around # 20/30, skirts... (carmelatte.co)