Covidien Curity Non-Sterile Cover Sponges 4" x 4" (1792). Curity Cover Sponges consist of cellulose wadding covered with a non-woven fabric. Economical, all-purpose sponge with good absorbent capacity. Non-sterile sponges conveniently packaged for faster, easier handling. 100/BG 20BG/CS (2000). Price per case.