Battlefoam wants to make sure your models get where they’re going in perfect condition and they know that all armies are unique, so they’ve got custom trays you can design to fit the models you own.
From the update:
Design your own P.A.C.K. Air size foam tray to fit your army’s specific needs. You can use the Custom Tray Creator to determine your tray’s layout. You can also trace your customized models and the Battle Foam Design Team will design your tray.