Retrofit Offroad hit the nail on the head with their hardtop sliding window kit! I held off on buying a JK for a long time because I couldn’t believe that there was no ventilation in the cargo area for dogs. As soon as I discovered that this kit was available I bought my Jeep. Installation was pretty straight forward, once you convince yourself it’s ok to take a saw to your hardtop. If Jeep was smart this would be a factory option.