We manufacture a unique Car Luggage Rack - the boot-bag. ( us limey's call a trunk a boot )
Boot-bag is a waterproof luggage bag that simply straps to the trunk lid of your Miata adding either 1.75 or 2.65 cubic feet of waterproof luggage space. The bag simply straps around your Miata's trunk. It sits on a soft non slip mat to protect paintwork. The straps stay in place once the bag is fitted and won't rub the trunk edge.
Read a review of boot-bag Miata Luggage Rack by the Delaware Valley Miata Club here.
Boot-bag Original 28"x15"x8" adding 1.75 cubic feet of extra luggage space $130 & $38 shipping.