Sometimes basic is just the thing. Seals makes their entry level cockpit cover better than its competitors' "better" models: urethane coated packcloth, double stitched, with a strong secure shock cord triple knotted at one end, pull U strap on the other. Easy to put on, doesn't wriggle and can remove w. one hand.
First time out drove at highway speeds about 120 miles - heavy rain for at least half of that, going home winds 15-20 gusting up to 30 at our back. Cockpit cover stayed on, just as taut, and *no* pooling. No water in cockpit. A reliable piece of protective gear for my kayak.