Yesterday I waged a day long war with a turtleneck.
As a result, I'm here today to give you some advice. If you decide to wear a turtleneck make sure the neck opening is loose enough to comfortably fit your head through. If it's not it will undoubtedly be too tight around your neck and you'll spend the entire day pulling and stretching the fabric in a feeble attempt to breathe. That's what I did yesterday and it sucked. So consider this a warning: wear turtlenecks with caution - they can be evil little monsters.