Ishta toilet seat covers turned out to be the best in this category of products. It is indeed a very superior product with premium soft fabric but waterproof on the other side, providing an effective barrier of protection against the seat surface. Other brands are cheaper but use flimsy, paper kind of material. An excellent feature is the fold at the end which you can put like a sleeve over the seat so one avoids touching toilet seat completely. Well done, Ishta !
Its great product for public toilets.