Yes. This mattress is actually very light. It is 10" deep so measure everything beforehand.

Yes. After owning it I realize it is able to be cut down. However once taken out of the package it will start to expand as air gets in it. Not sure what type of tool you will use to go through 10" of foam. Maybe a small teeth utility knife?

Suppose to be high density for the first 4" according to some reviews I read. It is much firmer than tempurpedics . It has much more of a sponge like feeling once it's fully expanded and aired. It's perfect for people with backpain.

You don't need a box spring with these mattress's. They are so firm that a box spring wouldn't do any good anyway. Quite honestly I've never figured out what box springs were for to begin with? Just another way for the big mfg's to make money is my take. I put mine on a platform bed, has been that way for a little over 2 years now. Mattress is as firm and upright as the day it arrived. I've had major back surgery and this mattress is the best sleeping thing I've ever laid down on!!! Beware though, once you get used to these, you will notice it when you're not sleeping on one! You'll be amazed at how well you sleep adn wonder how you ever slept without one!!!!!

Just think king size waterbed..ther're 84"x76". A regular King is 80"x 76" The California king is inly just longer!

Through some research, the brand name is Lifestyled and the manufacturer warranty is either 60 or 90 days. Walmart, however, stands by their products, so I would check with your Walmart store customer service to see what the policy for mattress purchases is in your state.

Check the refund tab for Walmart product return.
But why would you want to return it?
I have one, and it's great!

I think it would work, as it is flexible. But be sure you have a foot board to keep mattress from slipping off foot end of bed.