Although Blizzard has designed a plethora of content for your leveling pleasure, the vast majority of play time occurs once you reach the level cap.
It can be very frustrating reaching the level cap only to find that substandard gear limits your ability to be competitive in PvP.
In patch 2.4
the World of Warcraft
development team added a series of gear sets for purchase from quartermasters of Outland factions.
The Battlegear sets are of a superior quality and are equal to the Level 70 High Warlord sets that can be purchased with honor points.
These introductory level 70 sets will help boost your gear as you enter endgame battlegrounds and get your feet wet in the arenas. The pieces can be purchased by becoming honored with Cenarion Expedition, Honor Hold/Thrallmar, Keepers of Time, Lower City, and the Sha'tar. Which faction has the piece you need varies from set to set, but for the complete set you must be honored with all five of these factions.