Back Seat Extender Supports 400lb Seat Cover Hard Bottom-Detachable Dog Hammock, Dog Car Seat Cover with Hard Bottom ?Camping Air Mattress, Hammock Travel Bed Non Inflatable Car Bed Mattress is up for auction in Pet Supplies. The current bid is $1.00, 97% below the $36.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.