Primal Mooncloth Bag

The Primal Mooncloth Bag is a 20-slot container which can be made by Tailors.

Source
This item is crafted by Tailors with a skill level of 375 using Pattern: Primal Mooncloth Bag. The components are:
 * 8x Primal Mooncloth
 * 4x Netherweb Spider Silk

The base components needed to make the 8 Primal Mooncloth are:
 * 144x Netherweave Cloth
 * 16x Arcane Dust
 * 8x Primal Water ( 80x Mote of Water )
 * 8x Primal Life ( 80x Mote of Life) )

If you are spec'd for Primal Mooncloth Tailoring, the base components to make 8 Primal Mooncloth are:


 * 72x Netherweave Cloth
 * 8x Arcane Dust
 * 4x Primal Water ( 40x Mote of Water )
 * 4x Primal Life ( 40x Mote of Life) )

You'll need some patience, because it requires 32 days to make 8 Primal Mooncloth for this bag (16 days if you have the Primal Mooncloth Tailoring specialization).

Due to the above it's now possible to make a bag in one sitting, assuming you have all the materials.