The new craftable armor trade goods are Balanced Trillium Ingot (made from 1 trillium bar once per day, soulbound), Hardened Magnificent Leather (made from 2 magnificent leather once per day, soulbound) and Celestial Cloth (made from 10 bolts of windwool once per day, soulbound).
It will take 21 days to make enough to create a belt, and 28 days to make enough to create a pair of legs. There are placeholder recipes in for the blacksmithing patterns, but the leather and cloth patterns are for items ilvl 545. Some examples:
http://ptr.wowhead.com/spell=142964
http://ptr.wowhead.com/spell=142966
Looks like those will fall just around normal difficulty item level, though these things as always are subject to change.
I'm hoping that there's some sort of alternate way of getting the craftable trade goods using massive amounts of lesser material, since that seems like a long wait for a new pair of drawers.
And I'm kind of peeved that they added Kyparite at the start of the expansion then forgot it completely. Although we haven't seen the raid craftables yet so there may yet be a use for it.