The leather sheath is made of genuine leather and should be regularly treated with leather balm, beeswax, or leather care oil (e.g., Ballistol) to keep the material supple and protect it from cracking or moisture. The hand-forged cutlery must be cleaned by hand after each use, dried thoroughly immediately, and then rubbed with a food-safe oil such as cooking oil or Ballistol to effectively prevent corrosion and rust.