I would start with your intended purpose for the cover. Everyday cover, indoors to keep the dust off or outdoors to protect from the elements. Or is it for traveling.
My son and I have to keep our bikes (K7 Wee and DR650) outdoors in the SoCal sun and occasional rain. We have the Dowco guardian weatherall plus for both. Have been using them daily for about 3 1/2 years and both are slightly faded but in good functional condition.
For traveling, I have a lighter, more packable, unknown brand cover for the Wee.
"I feel more like I do now than I did a while ago."