Our headrest shrinker is a pre-assembled tool that attaches to an air compressor and effectively turns that compressor into a vacuum. You can then use the headrest shrinker in combination with a thin headrest bag to squeeze foam headrests down and make the installation of the headrest covers much easier.  You can purchase 20 or $8, 100 for $30, or 250 for $50. If you have any questions about our products please email us at [email protected] or give us a call at 1-866-639-7328.