Wardrobe allows you define up to 30 distinct equipment profiles (called "outfits") and lets you switch among them on the fly. For example, you can define a Normal Outfit that consists of your regular equipment, an Around Town Outfit that consists of what you'd like to wear when inside a city or roleplaying, a Stamina Outfit that consists of all your best +stam gear, etc. You can then switch amongst these outfits using a simple slash chat command (/wardrobe wear Around Town Outfit), using a small interactive button docked beneath your radar (Moveable), or define hotkeys in key configuration.

/wd - help
/wd list - List your outfits
/wd wear <name> - wear <name> outfit
/wd reset - erase all outfits
/wd lock/unlock - For moving Button/Menu.
/wd click/mouseover - For method of displaying menu.
/wd scale [0.5-1.0] - For scaling the DropDown Menu.
/wd auto 1/0 - Toggle auto-swapping

Full Documentation: http://www.wowwiki.com/Wardrobe