A
polo neck,
roll-neck (
UK) or
turtleneck (
US,
Canada) or
skivvy (
Australia,
New Zealand) is a garment—usually a sweater—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").