World of Warcraft-->Professions-->Leatherworking
This Profession allows players to work various leathers and pelts into leather armors as well as patches integral to the creation of higher-level, metallic armors and enhanced weapons. Leatherworkers are responsible for creating leather items for leather wearing classes: Druid, Hunter, Shaman, and Rogue. While the Paladin and Warrior can wear leather, they won't typically wear it unless they like the particular stats on an item and have nothing better at the time.

Armor Kits
Leatherworkers can create armor kits which are alternatives to Enchanting. Players must choose whether they want armor kits or enchantments on items to which both can be applied, such as chest pieces. Armor kits are permanent. You can place an enchantment over an armor kit or place a more powerful armor kit over a weaker one. Armor kits can only be applied to boots, chest pieces, gloves, and pants.

Becoming a Leatherworker
You should already be a skinner since you will need hides and leather to create your items. It is possible to be a leatherworker without being a skinner if you buy or are given the required ingredients by other players. But not many players will be a leatherworker without being a skinner since it's not very wise.

Recipe Ingredients
The main staple for leatherworkers is obviously leather as well as hides. These are found by skinning animals. You will likely not get enough leather and hides on your own so you are encouraged to buy leather and hides as well as have your friends collect them for you. Recipes also require various other ingredients such as dyes and thread purchased from a Profession merchant. You might also need rare gems which are found from monster drops, treasure chests, mining, fishing, and Rogue pick pocketing.