Lots of product yeah. Same for high volume combovers or anything like that, but not wax or gel, pomade is probably the the best. Also the barber or hairstylist needs to layer the top sections of hair appropriately to make it "light" and give it volume, otherwise it'll just flop down.

Before I grew out my hair, I was a big fan of the undercut hairstyle, buzzed and sometimes faded on the back and sides and long on top.