I would give it zero or negative stars, but one star is the lowest I can go.  

I have bedsheets thicker than this - it is pretty (Bright Blue), but:
1.  it is NOT weather proof,
2. it is NOT a sunshade, and
3. the fit is saggy and sloppy looking on a 10' x 10' frame.

I needed a replacement because the original topper was in tatters after a storm... this wouldn't have lasted 10 minutes.

Disspointed, and seeking a refund.