A turtle neck is a high collar that covers
most of your neck even when the collar is folded over itself.
A turtle-neck is typically knit shirt or sweater with this kind of
A polo neck, roll-neck or turtleneck (US, Canada)
or skivvy (Australia, New Zealand) is a garment with a close-fitting,
round, and high collar that folds over and covers the neck. It can also
refer to type of neckline, the style of collar itself, or be used as an
adjective ("polo necked"). The most common garment type utilizing
this construction would be a sweater.
This shirt is different than a
turtle neck. The mock turtle has a high color to cover
the neck, but does not have the fabric folded over itself like the
Learn more about
shirt necklines in our apparel definitions section.