It's great to see Peppa using the Snooza raised bed that we bought for Penny so many years ago.
Penny would only sleep on it if it had a cushion or blanket on it, and even on super hot days or nights wouldn't be happy without that covering. Snooza does say that their pet futon is cool, but I prefer the open bedding at the moment.
I've read that the open mesh is a good way to keep a dog cooler, as the air can circulate around their belly and paw pads. So we feel happy that Peppa doesn't care if there's no covering on the mesh.