It is most likley 2.2 oz per yrd coated ripstop. Tru silnylon is considered 1.1 oz per yard silicone impregnated. Our walmart will sometimes have the ripstop. I have never seen silnylon there! Not that it isnt possible? If you have ever compared the two I think you could tell the difference. Sil is glossyer looking than reg, ripstop as well as tissue paper thin.