Soft covers are made from a quilted fabric much like a jacket and are portable. The cover has a ring sewn into the bottom allowing the cover to keep its shape (oval or cylindrical).
The cover also has an exterior sleeve that houses a removable pole on the side of the cover to keep the cover in an upright position. When finished using the cover, you remove the pole, roll up the cover, and pack it in your case. instrumentcareapparel.com