The Stearns & Foster Estate® 13.5" Extra Firm Mattress 75 lbs for a twin XL size, 98 lbs for a full size, 118 lbs for a queen size, 150 lbs for a king size, 149 lbs for a cal king size, and 149 lbs for a split cal king size.

The dimensions of a Stearns & Foster Estate® 13.5" Extra Firm Mattress is 80" x 38" x 13.5" for a twin XL size, 75" x 54" x 13.5" for a full size, 80" x 60" x 13.5" for a queen size, 80" x 76" x 13.5" for a king size, 84" x 72" x 13.5" for a cal king size, and 84" x 72" x 13.5" for a split cal king size.

Yes, it is recommended to use a Box Spring with the Stearns & Foster Estate® 13.5" Extra Firm Mattress. Box springs provide mattress support, and improved airflow. They can also help distribute weight and reduce sagging while adding bed height.

A split king mattress is made up of two Twin XL mattresses placed side by side. This size is a great option for some couples because it features two separate mattresses for independent movement. There's a split in the bed so you can each select your own comfort level.

Mattresses last an average of 8-10 years.

Cleaning a mattress is a simple step-by-step process. First, remove all bedding and covers to wash separately. Then, use the upholstery attachment on your vacuum cleaner to thoroughly vacuum the entire surface of the mattress, paying special attention to seams, crevices and edges. Then, spot-clean stains where needed using different solutions depending on the stain type. Once the mattress is clean, sprinkle a generous layer of baking soda over the surface to deodorize. After a few hours (ideally overnight), vacuum the mattress thoroughly to remove all residue.

An extra firm feel is designed to keep you more on top of the mattress with less sink, so the surface feels steadier and more supportive. It is a good match if you prefer a flatter, more lifted sensation while still having comfort layers to cushion pressure points.

TEMPUR Indulge Memory Foam is intended to adapt to your shape as you settle in, creating contouring where your body needs it most. In this design, that adaptive feel is used to help ease pressure around areas like the shoulders, hips, and back without making the overall feel plush.

The foam layer provides contouring comfort, while the innerspring system provides a responsive support foundation. Together, they are designed to balance pressure relief with a more stable, supportive surface feel.

Airflow comes from ventilated coils and built-in air vents that are designed to move air through the mattress. On top, the cool-to-the-touch cover is made to feel refreshing when you first lie down.

It can be a strong choice if you want extra firm support paired with comfort layers designed for pressure relief in those areas. Since comfort preferences vary, trying it in store with a Mattress Firm Sleep Experts® team member can help you confirm the feel works for your body.