He wears it all the time, home or away regardless of the travel schedule. It seems to have become something of a superstition.
“That's my thing,” Durant admitted.
So, what does he have in the backpack?
Thunder coach Scott Brooks isn't sure.
“I know he doesn't have any money in there,” he said. “He never bought a meal in his life. You can guarantee (money's) something he doesn't have.”
Perhaps he's carrying around stuff for teammates or coaches.
“No,” Brooks said, laughing. “I'm a little jealous because I've had a backpack that my son gave me. I wear it all the time. I never get attention for that backpack.”
The mysterious contents of Durant's backpack have become so popular that TNT had a tongue-in-cheek segment about it earlier in the playoffs. Among the items Durant claimed to carry were his game shoes, his clothes for the road trip (three pairs of jeans, three shirts and dress shoes) and a basketball.
“And I got Dunkin Donuts and Krispy Kreme donuts for Chuck,” he said of TNT commentator Charles Barkley.
Thunder teammate Eric Maynor even joked, "Nate's in there sometimes."
Reserve guard Nate Robinson might be only 5-foot-9, but the backpack isn't that big.
Turns out, Durant's stash in his backpack is much smaller — Bible, iPad, headphones, three phones and phone chargers.
“I'm a little lazy,” Durant said, “so I don't like to carry all that stuff in my hands.”
Want to battle laziness like Kevin Durant?
There's a pack for that.