Hyjal Expedition Bag

Gives 5 tailoring skillups per bag created until it turns yellow at 500, for a total of 10 points. I've made two bags and gone from 490 to 500 tailoring. Now it's yellow, and I presume will only grant one point per bag at 500.

If you're crafting two of these, it would probably be wise to craft them when your skill is 494, so you get from 494 to 504 with just these two crafts. That way you get the maximum use out of them.

For new levelling tailors it's probably not recommended anymore to make Otherworldy or Embersilk bags from 484 to 494 because you have no easy option to skill once and make one of these to turn 500, where Windwool starts. Earlier, at 480, you should decide to make two bags till 490, than make two of these to turn 500.