That looks like the original Jayco branded storm cover, which is what I have and Im very happy with mine. I think they look really good and its quite a light weight material. The hard lid gas struts are at there limit on my van, and a heavier storm cover would cause my lid to sag under the weight. (Ive since had the struts re-gassed) These storm covers were originally supplied for the old original hard lids, before any of the new variations can about. They issue with the original lid installation is they were slightly to short to reach the van body on each side, requiring 2 inch web straps with press studs on each end to bridge the gap; not a huge issue, more stupid lack of Jayco's attention to deal.
Like many people I thought the plastic sail track riveted to the outside edge of the hard lid looked cheap and horrible. Many people mounted the plastic sail track to the seal edge of the hard lid, under the rubber seal. (we're talking old original style lid here). I went one further and ditched the bottom entry plastic sail track which was supplied, and replaced it with a single sided, side entry alum sail track like annex track which I also fitted under the lid seal. That makes the sail track all but invisible and allows the storm cover to reach the van body and fit as it should without the webbing straps, and I dont have that horrible looking track riveted to the outside edge of the lid
If this gobbledygook is confusing, I can grab some pics so it makes more sense