Zwift has many jerseys which you can unlock by entering particular codes. But there another set of jerseys which is temporary and much more coveted, as these are assigned to the fastest male and female riders currently on course.
The green jersey is given to the fastest riders on course for each sprint section.
KOM/QOM Jersey (Polka Dot)
The polka dot jersey is given to the riders with the fastest time up the course’s big climb. For Watopia that’s the “Hilly” climb, while London it’s Box/Fox Hill and Richmond it is Libby Hill.
The orange jersey is given to the fastest riders around the main route on a particular course. For Watopia that’s the “Hilly Route“, London it’s “London Loop” and Richmond it’s “2015 UCI Worlds Course.”
If you’re strong enough to be the fastest rider for more than one of the categories above Zwift will issue you a “combined” jersey.
Watopia has two additional KOM jerseys for the Epic KOM and Volcano Climbs.
Epic KOM (Mountain Goat)
Given to the fastest riders up the Epic KOM climb, you have to work for a while to earn this beauty! This jersey is white with blue polka dots and features a mountain goat (ibex) just like you see as you ride through the KOM banner at the top of the climb.
Given to the fastest riders up the volcano climb, this jersey is orangish-red and features a volcano image.
Losing the Jersey
Once you get a jersey you keep it for up to an hour, or until someone bests your time. If you log out, your jersey goes to the next-fastest person.
For more info on how the jerseys and timers work, see this Zwift Support post >