Comparison of Sharklet MP to Copper antimicrobial surface. MSSA and MRSA were used to challenge smooth unpatterned film, the MP film, and copper foil (99.9% pure) using a touch incident with time points sampled after 0 and 90 m of drying. Average log density values are presented for smooth, the MP, and copper surfaces. Error bars represent the SEM for 3 independent experiments. The percent reduction values were calculated using individual log reduction values comparing either Sharklet MP or copper to smooth control samples. p < 0.05 (*), p < 0.01 (**), p < 0.005 (***).