Kevin Durant's backpack will be part of Thunder star's Nike line

The accessory that will eventually hit shelves as part of the Thunder superstar's Nike KD III line has become all the rage during these playoffs. It's not just that Durant wears the backpack to every postgame press conference. He also leaves it on the entire time.

With all the straps buckled and tightened in front, he looks like he's ready to hike across campus to geometry class.

“People say they like it. People say they don't,” Durant said. “I'm going to stick with it.”

Intended or not, he is doing one heck of an advanced advertising campaign for the KD backpack. With Game 2 of the Western Conference Finals on Thursday night in Dallas, Oklahoma City's playoff run has already lasted more than a month. The Thunder has played almost every other day, and after just about each game, Durant and his backpack have been part of the postgame press conference. The footage is then used by national networks and local stations.

That's some serious product exposure.

It is unknown when the backpack with an embroidered KD logo will debut or how much it will cost once it hits stores, but a Nike backpack in Kobe Bryant's line retails for $90.

The thing is, no one ever suggested that Kobe's backpack should have its own Twitter account like KD's.

(Yes, that has been mentioned on the social networking site.)

The most persistent question during these playoffs has been “What's in Kevin Durant's backpack?”

More on that in a minute.

Durant first wore one of his backpacks to the postgame press conference after Game 4 of the Thunder's first-round series against the Nuggets. It made sense because after a late game, the team was trying to make a quick exit from the arena, bus to the airport and return home as quickly as possible.