Detailed renders of Slig Pants
Since the Sligs do not have actual legs, the Glukkons have manufactured special harnesses for them to use known as Slig Pants. One type is a pair of robotic pants. With the pants on, the Slig would be able to maneuver across terrain that would be very difficult to cross for a Slig with no pants. In Abe's Exoddus, Abe discovered these harnesses in machines that are similar to vending machines. A Slig in need of pants would move in front of it, hit a button and they would get a pair of pants.
Concept Art for Slig Pants