OppoSuits is a clothing company founded by Jasper Castelein, Jelle van der Zwet and Guus Bakker in 2012 in Amsterdam. With warehouses in Holland, UK and United States OppoSuits' products are shipped worldwide.is a clothing company founded by Jasper Castelein, Jelle van der Zwet and Guus Bakker in 2012 in Amsterdam. With warehouses in Holland, UK and United States OppoSuits' products are shipped worldwide.