There are three main types of jumper:
The round-neck jumper: this is the most classic jumper, with a round neck and long sleeves.
V-neck jumper: this type of jumper has a V-shaped collar, giving it a more casual look than the round-neck jumper.
Turtleneck jumper: this type of jumper has a collar that folds in on itself and reaches up to the chin. It is often worn in winter to protect against the cold.