Set: Full Winter Garb
Sold in The Exodar and Ironforge by neutral Smokywood Pastures vendors. Horde tailors must prepare themselves to die in various creative ways on their journey to buying this recipe. Although The Exodar is less populated by players, the zone does not allow flying by players (because it technically isn't part of Kalimdor). Ironforge is much easier to get into because of old-world flying, but is waaaay more populated.
Alliance tailors: this recipe will be mailed to you at the start of Winter Veil; no need to purchase it.