Therapedic Mystic Twin Xl High Profile Foundation
SKU: 50817722
A high profile flat foundation provides support for the mattress while ensuring the best mattress feel - coordinated with Therapedic mattress aesthetics.
Collection
Box Spring
Warranty
10 year limited warranty -
View WarrantyColor
Black
Foundation height
High profile
Pattern
Geometric
Upholstery material
Fabric
Q&A answers generated with AI assistance.
What are the specific dimensions of a Twin XL foundation compared to a standard Twin?
A standard Twin foundation is typically 75 inches long, while this Twin XL model measures 80 inches in length. This additional 5 inches of legroom makes it the preferred choice for growing teenagers, tall adults, or guest rooms where space is limited but comfort for a full-grown sleeper is a priority.
Is a Twin XL foundation suitable for a college dorm room or a small apartment?
Absolutely. The Twin XL size (80"L x 38"W) is the standard for most university housing because it provides an extra 5 inches of length for taller students while maintaining a narrow footprint. This specific model is ideal for a transient lifestyle; its black upholstered fabric and geometric pattern offer a polished, finished look that coordinates well with modern decor, even if used with a simple metal frame in a compact living space.
How much height will this mattress foundation add to my bed setup?
This is a "high-profile" foundation, which stands 9 inches tall. It is an excellent choice for sleepers who prefer a traditional bed height or for those using a low-profile bed frame who want to elevate their mattress for easier entry and exit. If you are looking to create a more commanding presence in your bedroom, this 9-inch height provides significant lift compared to 5-inch low-profile alternatives.
Why should I use a foundation instead of placing my mattress directly on a slatted frame?
Using a flat foundation ensures your mattress has the consistent, level support required to prevent the material from dipping between slats. Based on our expertise in mattress longevity, many manufacturers require a solid foundation to maintain warranty protection. This Therapedic model provides that essential flat surface, which helps distribute weight evenly and preserves the integrity of your mattress's internal structure.
What is the difference between this high-profile foundation and a traditional box spring?
While they may look similar, a foundation like the Therapedic Mystic provides a rigid, flat support surface rather than the flexible "give" found in traditional coiled box springs. This sturdy construction is specifically designed to support modern mattress technologies, including memory foam and hybrids, by preventing sagging and ensuring the mattress maintains its intended feel over time.
How do I maintain the upholstered fabric on this foundation?
The black fabric upholstery is designed for durability and aesthetic coordination with Therapedic mattresses. Based on our material care recommendations, we suggest occasional vacuuming with an upholstery attachment to remove dust. Because the foundation is a high-traffic area for dust mites and allergens, keeping the fabric clean helps maintain a healthier sleep environment.
38.00"w x 79.50"d x 9.00"h
4.1 out of 5 stars
Pillow size change
This review was collected as part of a promotion
We are using Tempurpedic neck pillow for many years and liked it a lot. The new pillow quality and is good, but the size is much smaller, it is 20 inches instead of 23 inch. The 6 inch gap between our pillow is very uncomfortable.
Review provided by Sealy
Too squishy
This review was collected as part of a promotion
This pillow offers absolutely no support. If it wasn't a pain to return, I would have. Basically, it holds no shape and it sinks all the way down through the night. So you wake up with debilitating neck pain. What a waste.
Review provided by Sealy
It’s OK
This review was collected as part of a promotion
Pillows are heavy, so you’d think they’d be very supportive. But no, as soon as your head hits the pillow, it goes down! So not very supportive or comfortable.
Review provided by Sealy
Perfect Adjustable Pillow With Cooling Comfort
This review was collected as part of a promotion
Pillow has been a fantastic addition to my sleep routine. The adjustable fill is a game‑changer—it let me customize the height and firmness until it felt just right. The cooling feature really works too, keeping the pillow comfortable throughout the night without overheating. Overall, it’s supportive, comfortable, and incredibly easy to tailor to your personal preference. I’ve slept better since switching to this pillow, and I genuinely love.
Review provided by Sealy
Finally my head is up
Needed a base to raise head and feet. Helps my back
Review provided by Sealy

