This calibration target for Mars 2020's Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals (SHERLOC) instrument includes five samples of spacesuit material, the first to ever be flown to the Red Planet. By studying how these samples degrade in the Martian environment, engineers can develop better spacesuits. https://photojournal.jpl.nasa.gov/catalog/PIA23303
Album Mars_2020_Perseverance