Get this pattern from Wyrmrest Accord once you have enough reputation with them. Quartermaster is at the top of the tower south of Dalaran in Dragonblight. 440 skill needed to make it.

Ugh, made 4 frostweave bags to try and skill up 1 point for the 440 and still didn't get it... Time for a hat of wintery doom I think.

4 Spellweave
  4 Bolt of Imbued Frostweave
    8 Bolts of Frostweave
      40 Frostweave
    8 Infinite Dust
  8 Eternal Fires
    80 Crystallized Fire

2 Moonshroud
  2 Bolt of Imbued Fostweave
    4 Bolts of Frostweave
      20 Frostweave
    4 Infinite Dust
  4 Eternal Lifes
    40 Crystallized Lifes

Final Mats
60 Frostweave
12 Infinite Dust
40 Crystallized Life
80 Crystallized Fire

its going by the old cloth specs from bc
im shadowcloth specced so i get two ebonweave when i make that but only one each of moonshroud and spellwave