Does walmart carry air mattresses in the store

Yes

Yes but comes with a no return policy.

Yes, but their return policy is that you can't return or exchange them after purchase. I bought one, got it home, and realized i grabbed one that was too small. I never opened the box, but they wouldn't let me return it due to policy. Just a heads up Because once you buy it, it's yours.

Yes they do, they come in a box