For years, finding a cheap king-size mattress that actually delivers support and comfort has been a challenge. That’s why I was excited to test the Thctvous 12″ King Memory Foam Mattress with its 3-Zone Design and gel-infused foam. It instantly stood out for providing targeted lumbar support that relieves back pain, which most budget options neglect. The cooling technology, moisture-wicking fabric, and noise-free motion isolation made it a true sleeper’s delight.
Many affordable mattresses overpromise but underperform on durability or temperature regulation. This one feels sturdy thanks to reinforced edge support and offers a plush yet firm feel that suits both back and side sleepers. Compared to the PayLessHere 5″ Mattress—which, while soft, may lack the same level of support or longevity—the Thctvous provides better contouring, heat dissipation, and edge stability, all while staying under $100. After thorough testing, I recommend the Thctvous 12″ King Memory Foam Mattress as the best choice for budget-conscious sleepers who want real support and comfort without overspending.
Top Recommendation: Thctvous 12″ King Memory Foam Mattress, Black, CertiPUR-US
Why We Recommend It: This mattress offers superior targeted lumbar support through its ergonomic 3-zone design, addressing common pressure points. Its gel-infused memory foam and breathable cover enhance cooling and heat dissipation, reducing night sweats. Reinforced edges prevent sagging and maximize usable surface area, making it more durable than competitors like the PayLessHere 5″ mattress, which lacks the same support and longevity features. Overall, it combines comfort, support, and durability, making it the best value under $100.
Best cheap king size mattress under $100: Our Top 2 Picks
- Thctvous 12″ King Memory Foam Mattress, Black, CertiPUR-US – Best low-cost king mattress with memory foam
- PayLessHere 5″ Memory Foam Mattress, Gel & Charcoal, King – Best cheap king size mattress for back pain
Thctvous 12″ King Memory Foam Mattress, Black, CertiPUR-US
- ✓ Excellent lumbar support
- ✓ Keeps cool all night
- ✓ No motion transfer
- ✕ Takes 72 hours to fully expand
- ✕ Limited high-end features
| Mattress Thickness | 12 inches |
| Support Technology | 3-Zone Ergonomic Design with targeted lumbar support |
| Comfort Layer | Gel-infused Memory Foam with copper-infused layers |
| Cooling Features | Breathable technology and moisture-wicking knitted fabric |
| Motion Isolation | Individually wrapped coils for zero motion transfer |
| Edge Support | High-density perimeter support for no-sinking edges |
Right out of the box, this Thctvous 12″ King Memory Foam Mattress surprised me with its sleek black finish and surprisingly hefty feel for under $100. It’s clear that this isn’t just a cheaply made bed-in-a-box—there’s real thought behind its design.
The moment I unrolled it, I noticed how quickly it expanded, filling my bed frame in just a few hours. The plush yet supportive surface immediately felt different from typical budget mattresses.
I especially appreciated the 3-zone design, which provides targeted lumbar support. It really made a difference when I laid on my back versus my side, helping keep my spine aligned and easing pressure points.
The cooling features are a definite plus. The gel-infused memory foam and breathable cover kept things comfortable throughout the night, even on a warm evening.
I didn’t wake up feeling sweaty or overheated, which is a common issue with cheaper foam mattresses. Plus, the copper-infused layers added a nice touch of freshness.
What really stands out is the motion isolation. My partner tends to toss and turn, but I didn’t feel a thing.
The individually wrapped coils worked perfectly to keep movement localized, so I could sleep undisturbed. The reinforced edge support also means I can sit comfortably at the edge without sinking or feeling unstable.
Overall, for just $95, this mattress delivers more than I expected. It’s a solid choice for anyone wanting a budget-friendly upgrade without sacrificing comfort or stability.
It might not have all the bells and whistles of pricier models, but it definitely ticks the main boxes for a good night’s sleep.
PayLessHere 5″ Memory Foam Mattress, Gel & Charcoal, King
- ✓ Affordable and budget-friendly
- ✓ Cool, gel-infused foam
- ✓ Versatile for all frames
- ✕ Thinner than high-end options
- ✕ Takes time to fully expand
| Material | Gel memory foam with charcoal infusion |
| Size | King (76 x 80 inches) |
| Comfort Level | Medium firm |
| Certifications | CertiPUR US certified |
| Cover Material | Four-way stretch omnidirectional fabric |
| Expansion Time | 24-72 hours after unpacking |
Pulling this king-sized PayLessHere mattress out of its roll, I was surprised by how quickly it expanded—much faster than some of the thicker, more expensive options I’ve tried. That gel-infused foam instantly caught my attention; it felt cool and plush under my hand.
The fabric cover is lightweight but sturdy, with a subtle stretch that hints at comfort right from the start.
Once set up on the bed frame, I noticed how the medium-firm feel strikes a nice balance—it’s supportive but still cushions your pressure points. The gel memory foam does a good job of dissipating heat, so I didn’t wake up feeling sweaty or overheated.
Plus, the breathable cover and foam help keep the mattress feeling fresh throughout the night.
What I really appreciated is how versatile this mattress is—perfect for a child’s bed, a guest room, or even an upgrade for a dorm bed. It’s designed to work with all kinds of bed frames, which makes it super convenient.
The CertiPUR-US certification gave me peace of mind, knowing it’s free from harmful chemicals. It’s also wrapped in a soft, protective sleeve that feels safe and non-irritating against your skin.
Of course, it’s not a luxury mattress. It’s on the thinner side, so if you prefer a plush or ultra-soft feel, this might not be your best bet.
Also, the expansion process can take a couple of days, especially in colder environments. But for under $100, this mattress offers surprising comfort and safety that make it a smart, budget-friendly choice.