During the off-season in Formula 1, drivers get more time to themselves away from the circuit without the hustle of travelling worldwide every second weekend or so.
The latter two mentioned racers compete for AlphaTauri (formerly Toro Rosso), Red Bull's junior squad.
Kitzbuhel crew.✌️?? pic.twitter.com/T3liX9kLlm— PIERRE GASLY ?? (@PierreGASLY) January 25, 2020
Vettel took his first win for Toro Rosso in 2008 and moved to Red Bull the following year, winning four consecutive world championships from 2010 to 2013.
Since joining Ferrari in 2015, Vettel has failed to secure a world title - however it is clear that his friendship with Red Bull hasn't been tainted in the five years that he has been away from the Milton Keynes squad!
Bahrain International Circuit - Winter testing