Hi Fabio - The CPMS30V Reeves knife is delivered with a kydex lined nylon sheath. Yes it does get rust spots along the bare edge after saltwater submersion. I erroneously stuck it back in the sheath after a few days of drying and there must have been a drop of water left in the Kydex which caused a heavy rust spot ending in what now looks like a small chip on the sharp edge. Reeves recommends using an air hose to blow off the knife and sheath after use.