I shall follow my derailing companion with this.....
A few months ago I got an OC1 that had been built to order.
The builder basically insisted I get a cover, and suggested a Surf Aids stretchy one for ease of use.
Got the boat delivered with the cover - it is hi vis for safety when on the car, easy to get on and off, doesn't matter if it rains on it as it will dry out, and you can put it back on with the boat (board) wet without fear of steaming it in the sun.
Prior to this I had got my F18, which at 18'4" was beyond any cover I had.
So I enquired at Surf Aids, could they make at stretchy cover?
Yes.
A few basic measurements and about 2 days later it arrived, custom made.

Easy to put on and off.

Tenuous link to this thread, similar to the SIC bags, you can use the board's handle to carry it as the cover is stretchy enough to fit your hand in.

Not as much ding protection as a more solid cover, but important sun protection, and ease of use means I'm more likely to actually put it on after a paddle.

So pleased with it, I ordered another one for the Nozza.
This one took a day to arrive.
But again, custom made.

You can use the LiftSup handle through the cover, or grip the board pretty easily.

It adds no weight to the board for lifting, and the problem of wet boards in wet covers no longer exists.

No affiliation with Surf Aids, just a happy customer.
And I better go tie Nozza on.........