Amazon.com: ARKSEN Roof Top Luggage Storage Bag for 64" x 39" Roof Baskets Waterproof 21.5 Cubic Feet (62.2" L x 33.07" W x 18.11" H) with 10 Straps Anti-Slip Mat 6 Door
Build it yourself in the VW T6 California Ocean - DIY protection for the tent in the pop-up roof - YouTube