The best mattress deals you can get on Prime Day 2019 - including a Casper mattress for up to $300 off

Casper 10-Inch Memory Foam Mattress (Queen), $695 (originally $995) [You save $300]

Casper is another brand that I've slept on and reviewed.

I've tested its updated flagship mattress and the new foam and spring hybrid, and both provide cool and comfortable nights of sleep.

The Casper memory foam mattress has 10 inches of CertiPUR-US-certified foam that's split into four layers that are breathable, relieve pressure, responsive, and adaptive to address your body type and sleeping position.

Casper also offers a 100-night trial and a 10-year warranty.

Casper 8.5-Inch Essential Mattress (Queen), $490.04 (originally $600) [You save $109.96]

The Essential Mattress is Casper's most basic bed, but it doesn't skimp on quality.

The 8.5-inch-thick mattress has three layers of foam — a soft and breathable comfort layer, pressure relief memory foam layer, and base foam layer. The foam is contained within an upholstery-grade cover that's designed for years of durability.

And, it comes with the same trial and warranty periods as the 10-inch foam mattress.

Classic Brands 14-Inch Memory Foam Mattress with 2 Pillows (Queen), $299 (originally $501.80) [You save $202.80]

Classic Brands 12-Inch Memory Foam Mattress (Queen), $235.25 (originally $335.77) [You save $110.90]

Classic Brands Mercer 12-Inch Memory Foam and Innerspring Hybrid Mattress (Queen), $248.49 (originally $452.57) [You save $204.08]

Classic Brands 4.5-Inch Memory Foam Sofa Bed Mattress (Queen), $98.48 (originally $148) [You save $49.52]

If you don't mind foregoing the risk-free trial and going with a lesser-known brand, you might want to consider the bargain-basement deals available from Classic Brands. It's discounting four well-reviewed mattresses by up to 45% during Prime Day 2019.

They range from a 4.5-inch-thick memory foam mattress meant for a sleeper sofa bed to a 14-inch-thick cooling gel and memory foam mattress that comes with two pillows. Classic Brands also offers a 10-year warranty on all of the mattresses — except the 4.5-inch, which comes with a 3-year warranty.