Luxury Firm Mattress in a Box 16 Inch Review

 

After sleeping on SweetNight mattresses for over 2,000 nights across multiple properties—including my primary home, guest house, and Tybee Island beach house—I’ve developed a deep understanding of their long-term durability. This review covers the new SweetNight 16-Inch Luxury Firm Hybrid Mattress, a significant upgrade from the 12 and 14-inch models I have used for the past five years.

I have personally purchased nine of these mattresses for my family and staff. This is not a sponsored review; I do not accept sponsorships. This is a real-world assessment based on half a decade of nightly use.

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Mattresses are shipped via FEDEX ground and usually arrive in 4-7 days. 

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A Comprehensive Review of the 16-Inch Luxury Firm Mattress in a Box

Finding a high-quality mattress that combines convenience with true luxury can be a challenge. After sleeping on this specific brand for over five years, I’ve seen how they perform long-term. In this latest review, I’m looking at the 16-inch Luxury Firm Mattress in a Box, a significant step up in profile and support.

This is not a sponsored review. This is an honest look at a product that my family and I have used and trusted across multiple properties for half a decade.

Why the 16-Inch Profile?

Most “mattress in a box” options range from 10 to 12 inches. Moving up to a 16-inch luxury firm profile provides a much more substantial feel, similar to what you would find in high-end hotel suites. This extra height isn’t just for looks; it allows for more sophisticated layering of transition foams and support coils, which is essential for proper spinal alignment.

Relief for Shoulder, Hip, and Back Pain

One of the most common questions I get is about mattresses and chronic pain. If you suffer from shoulder, hip, or back pain, the surface you sleep on is often the culprit. A mattress that is too soft won’t support your spine, while one that is too hard creates pressure points.

The “Luxury Firm” feel is designed to be the “Goldilocks” of mattresses. It provides enough “give” to cushion the shoulders and hips while maintaining a firm enough base to keep your back supported throughout the night.

5 Years of Real-World Testing

Anyone can give a review after one night, but the true test of a mattress is how it feels in year three, four, and five.

• Durability: Unlike cheaper foam-only mattresses that tend to sag or “valley” over time, this brand has maintained its structural integrity.

• Consistency: The support remains consistent from the center to the very edge of the bed.

• Cooling: Even with the thicker profile, the airflow design helps prevent the “sleeping hot” issue common with many box mattresses.

What to Expect: Unboxing and Setup

Because this is a 16-inch mattress, it is heavy. It arrives via FedEx Ground (usually within 4–7 days), and I highly recommend having a second person help you move the box to the bedroom.

Once you break the seal, the mattress begins to expand immediately. While you can technically sleep on it within a few hours, I recommend giving it a full 24 hours to reach its maximum 16-inch loft and for any “new mattress” scent to dissipate.