All covers for the Pillion Pooch are made from the same grade of material, a minimum of 600gsm PVC coated Polyester. We do not recommend riding with the cover off, it is there for the safety of the dog and it is just as important to provide shade for the dog when riding. In hot weather, the front door can be rolled up and clipped in place and the rear ventilation zipper can be opened to allow air to flow through the unit. Here are some ideas from other customers: Installing small fans within the Pillion Pooch (mounted on the roll bars near the Apex). Carrying a spray bottle full of water to stop and spray the dog down periodically. Soaking a lightweight neck scarf for the dog to wear and provide evaporative cooling. These ideas seem to work well. Our dogs have always been very tolerant to heat being short haired dogs from hot countries (Australia, Venezuela and Colombia). We've tested the Pillion Pooch in temperatures of 40℃ for long periods. We ensure we have frequent breaks (once an hour) with plenty of cold water to drink in the shade. If you are concerned about your dogs health or safety in the heat then please ride early in the morning or late in the afternoon, only take them for short rides or if they are really struggling then do not take them at all. The dogs safety must come first. If you are on Facebook, you could join the Bow Wow Bikers group and post a question in there to get other riders opinions on how they deal with this issue.