Translated Sheath in this case means sword sheath, which is supposed to be an analogy to the gaming mice of ASUS, which carry swords like e.g. Gladius or Spatha...
Returns and warranty
ASUS ROG Sheath Short Review - Huge premium mousepad
ASUS ROG Sheath XXL mouse pad Unboxing
ASUS ROG Sheath Gaming Mouse Pad Unboxing