What is a frozen sheath?

Frozen sheath, also called frozen sheath, is a kind of sheath used to protect swords. Traditionally, the frozen scabbard is usually made of leather, which is used to wrap the scabbard of the sword to prevent the sword from rusting or wearing because it is not used for a long time. The name of the frozen sheath comes from its manufacturing method, that is, the sheath is put on the sword, then soaked in water and frozen, so that the sheath and the sword are closely combined to form a protective layer. However, modern scabbard is usually made of plastic or other synthetic materials instead of traditional leather products.