The Nautilus 1840 is a comfortable new style that comes equipped with full-grain, Nubuck leather, a Composite Toe and is also waterproof. Nautilus ESD safety toe shoes are some of the best in the industry. Removable PU Sockliner. Rubber Oil-Resistant Outsole. EVA Midsole. No Exposed Metal to Meet Scratch Resistant Workplace Requirements. Meets or Exceeds ASTM 2413-11 Impact / Compression and SD Ratings.