We use different types of materials for different applications for a good reason.
The tan cover uses Snyder vinyl laminate which is a slicker material because it is a winter storage cover. While the material type and pitch of the cover make it unsuitable for summer storage, those attributes make it perfect for a winter storage cover. Both the blue and the gray cover are made of Top Notch, which is our regular summer fabric. It is extremely durable and heavy duty, but not suited for winter storage covers. As you can see that it holds the the snow much longer than the Snyder on the winter storage cover.