What Are Rigs?
Rigs are new armour items that act as a kind of container. Things like
backpacks and bandoliers that can be used to hold items, except that they are
worn. Their main intent is to help clean up player inventory a little, as well
as improve overall carrying capacity.

Items stored in a rig should stay stored in the rig over such things as
reboots and crashes. However, important items (such as your best eq) should
still remain worn or chested as normal. Each rig has a maximum storage
capacity dictated by its size and sturdiness, and a weight modifier applied to
its carried goods based on the density and quality. Enchanted rigs can also
exist that provide stats (like any other armour) and even further storage
space.

Rigs are still in development, so you won't find any "eq" rigs for a while.
Feel free to have a merchant craft you one in the meantime, maybe even use the
jewel enchanters to power it up a bit. Once the major problems with rigs are
settled, then some monster you know and loathe might start carrying them.

Most players get one rig slot. Centaurs, with their massive flanks, can carry
two. Barsoomians' many arms prevent them from using a rig at all.

Shinarae Lluminus