Mattress in a Box Medium King Mattresses

King

Whether you're settling in for an afternoon nap or drifting off for a good night's rest, this mattress is here to help you get the sleep you need. Crafted from layers of memory foam, it features medium firmness and a breathable design to help keep you cool while you sleep. Plus, with its tight top and low-motion transfer design, it's great if your partner tosses and turns. This product includes a stain and fade-resistant cover to help keep your mattress feeling fresh and the cover fabric is designed in a white hue that won't peek through lightly coloured sheets. Our mattress is backed by a 10-year warranty.

Bought this mattress to fit our daughter’s top bunk. It’s pretty comfortable and firm. So far no complaints! It fit perfectly!. Anike. Houston, TX. Fri May 02 2025

King

This memory foam mattress updates your bed with support and a breathable feel all at once. It has a medium-firm feel made up of three layers: A high-density base foam, ventilated pressure relief foam, and a top layer of memory foam infused with green tea. The middle layer is designed to eliminate pressure points along your body, with airflow to reduce body heat while sleeping. Plus, with its tight top and low-motion transfer design, it's great if you have a sleeping partner who tosses and turns. We love that it's 10'' high and yet comes conveniently rolled in a box for easy shipping. Simply unbox, unroll, and give it some time to expand. Plus, this mattress comes with a 10-year warranty.

Cozy bedroom vibes!! Great purchase. Comfortable mattress, great sleep!. Anca. Belleville, MI. Thu Jun 26 2025

King

This 8" medium memory foam mattress lays the foundation for a good night's sleep. It's crafted from polyester in a white hue with a wide variety of sizes to choose from. Its rectangular silhouette features a tight top that provides proper edge support, making sure your sheets stay in place. The layers of high-density quilting foam and padding contour to the shape of your body. This mattress arrives compressed inside a box, so we recommend giving it time to expand to its size. Best of all, it's backed by a 5-year manufacturer's warranty.

I bought this originally in a queen size 14 inch and for my guestroom and everyone loved it so I ordered for the trundle bed, in the 8 inches which was recommended. It’s perfect and waiting on the 2nd. Shannon. Nepean, ON. Wed Jul 02 2025

King

Whether you're settling in for an afternoon nap or drifting off for a good night's rest, this mattress is here to help you get the sleep you need. Crafted from layers of memory foam, it features medium firmness and a breathable design to help keep you cool while you sleep. Plus, with its tight top and low-motion transfer design, it's great if your partner tosses and turns. This product includes a stain and fade-resistant cover to help keep your mattress feeling fresh and the cover fabric is designed in a white hue that won't peek through lightly coloured sheets. Our mattress is backed by a 10-year warranty.

It’s okay. It was easy to remove from packaging and it is indeed 12”. My partner seems to really enjoy it, but I find it way too firm. It’s described as medium…..but it feels much firmer than that…to me at least. Oh well. Didn’t care for the old mattress anyways so doesn’t make that much difference at the end of the day for me…shrug.. Parker. Los Angeles, CA. Tue Jun 24 2025

King

This 14" thick mattress has a tight top and low motion transfer, so it's designed to let you stay asleep, even if your partner tosses and turns. Three layers of memory foam have a medium firmness and a breathable design that helps keep you cool while you sleep. It includes a stain- and fade-resistant polyester cover to retain mattress freshness, and it's a white hue that won't peek through lightly colored sheets. This mattress is also compatible with an adjustable bed base (base and frame sold separately). It arrives at your doorstep packed in a box and is backed by a 10-year manufacturer's warranty.

My son loved soft and firm same time. Yelen. Camas, WA. Mon Jun 23 2025