Non-Woven Sponges, 4-Ply, Sterile – 10.2 x 10.2 cm (4″ x 4″) 50/Box. High-quality, 4-ply non-woven polyester/viscose blend sponges provide optimum absorbency and air permeability. Non-fraying edges reduce linting, unravelling and snagging for cleaner, safer wound and incision site management. 2 sponges per envelope; 50 envelopes per tray. Sold as Box/50.