Saya covers prevent damages on knives during transport. We strongly recommend our customers who often carry knives to purchase Saya covers. Magnolia wood is a commonly used for Saya cover, because Magnolia wood material is able to withstand water for a long time.The breathable Magnolia wood material protects knife blades from corrosion. The Magnolia wood material has also been used in Samurai sword sheaths, so this age-old wisdom dates back to olden times. The Saya cover comes with a Saya pin which is very useful to keep the knife in the Saya cover.