It also allows the bags to maintain its distinctive shape when outside the trunk. An inner layer of soft but durable nylon material is easy on the hands and on your belongings The reinforced base further protects your belongings Q: What's up with the 2-piece upgrade set? A: This works with the Pontiac Solstice Luggage Bags Basic Set to maximize your trunk space. Note that you will not be able to use the upgrade set with the top folded.The item "Pontiac Solstice Luggage Bags 2-Piece Upgrade Set" is in sale since Wednesday, November 21, 2018. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Interior\Cargo Nets, Trays & Liners". The seller is "pontiac11llc" and is located in Traverse City, Michigan. This item can be shipped worldwide.