Sofa Cushion Cover

Front Back canvas water resistant layer (ripstop) 2015-10-15f I made simple box Cushion covers to Zipper protect the leather. So far, so good! The canvas & the ripstop. kept cat throw-up. original cushion Canvas from leaking through. Washed it → still fits, yay! ☺ a polyurethane layer make sense? Hmm... would adding Check for rubbing against leather or Maybe front panel? trapping of moisture.