Profession bags will be in high demand in The War Within — each new bag comes with a special effect, such as increasing reagent gain or decreasing cooldowns! Tailors will have a new bag full of tricks once they learn these new recipes, and every profession will want to obtain one of these new bags. Each is Unique-Equipped, so unfortunately you can't double up on effects, but you can equip two different profession bags at the same time — you won't have to choose which of your professions you find more important!