Every guy that has ever gone shopping for a sweater soon becomes puzzled when he discovers how many different styles of collars actually exist. You just want to look good and find the best bargain possible, but you never expected to be bombarded with all of these different terms. All this fancy fashion jargon can be quite confusing, but once you know the basic collar styles available, the difference between a v-neck and a turtleneck will be obvious.
Turtlenecks are sweaters with a high, tubular collar.
They usually have a long neckline, which is rolled over once for a better fit. Since the neck is covered from the top to the collarbone, turtlenecks are usually worn to keep your neck warm in colder climates. Turtlenecks are appropriate for both casual and formal events. When worn under a classy business suit jacket, a proper turtleneck can replace the conventional shirt and tie. I wouldn't recommend wearing a turtleneck to very important business meetings, but on an average day they can definitely upgrade your look.