The Leather Pants was part of the second tier armour set. They gave a better overall protection than their tier 1, Cloth, counterparts. This was especially true when it came to protection from Radiation.
To other players the pants appeared as light blue jeans.
The pants could be obtained in three different ways:
The pants could be crafted using 12 Leather. Doing so would take 10 seconds and yielded one pants.
To learn how to craft them the player had to either obtain it's corresponding Blueprint from Rad Animals or use a Research Kit. When using the Research Kit method, the player had to drag the Research Kit onto the pants with one Paper in their inventory.