The shell fits loosely over the Q 120 even with extended cartridge holder. The material is a kind of rubberized fabric and therefore stronger and more stable than the conventional cases that we know so. The individual parts of the sleeve are sewn. The case provides a good rain and dust. The Fixing clips with Velcro, which gather the envelope a bit, I find something poplig. Here a stable cord would have brought more. Since the shell is black, we pretty hot in direct sunlight. About the durability can not say much, I look at the cover only half a year, at the seams so I have some concerns, but you will. Basically, the shell is first time much more valuable than the shells that I had for garden benches or the mower. But they cost only 20 percent compared to the Weber shell, but are torn apart after 3 years. 4 stars for the Weber-new shell.