At his house in Scottsdale, Arizona, Derek Hales has plenty of space.

He's got six bedrooms and a five-car garage.

But sometimes, things can get a little tight because Hales shares

his home with dozens and dozens of mattresses. I am the founder and editor-in of nap lab.com. It's a platform that tests and reviews

mattresses. Hales is a full-time mattress reviewer and he takes the job very seriously.

So we have 10 different factors that we test.

For cooling, we have a thermal camera that does surface level temperatures.

For motion transfer, we use an accelerometer.

For response time, we're pressing a medicine ball into the mattress,

measuring exactly how long in seconds it takes to recover back to its original shape.

For Edgport, we take photographs in videos and then measure those in Photoshop to the

pixel level to determine precisely how much terms of inches that something is,

bouncing or sinking.

There's a reason Hales goes to so much trouble.

In the US, mattresses are a $13 billion industry.

More and more shoppers now buy their mattresses from direct to consumer brands,

like Casper and Lisa through the internet.

When customers search online for something like

What's the Best Matress?

Nap lab tries to be one of the first results.

And when someone buys a mattress through one of the links on the website,

the mattress brand pays hails a percentage of the sale.

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