First off, lighter is not necessarily better. A thin nylon cover or plasticized paper type cover can be very difficult to use in any kind of breeze. A heavy cover is also difficult for a person of small stature to handle. Fabrics that weigh between 4 and 7 ounces per square yard are considered ideal, and that is our target weight for most Covercraft covers. The other property that is important to consider is bulk.
Bulky covers are hard to handle and hard to store.