12" ActiveAlign Reactive Copper Zoned Memory Foam Mattress - Medium (12REACTIVE)
Model 12REACTIVE
or 4 interest-free payments of $122.25 with Klarna
Crossed-out price = manufacturer’s suggested retail price (MSRP). What “Regular” means
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SKU: 12REACTIVE-TL
Model codes Model: 12REACTIVE
- Twin XL:
12REACTIVE-TL - Full:
12REACTIVE-F - Queen:
12REACTIVE-Q - King:
12REACTIVE-EK - Cal King:
12REACTIVE-CK - King Split:
12REACTIVE-EKS
Model numbers: 12REACTIVE, 12REACTIVE-TL, 12REACTIVETL, 12REACTIVE TL, 12REACTIVE-F, 12REACTIVEF, 12REACTIVE F, 12REACTIVE-Q, 12REACTIVEQ, 12REACTIVE Q, 12REACTIVE-EK, 12REACTIVEEK, 12REACTIVE EK, 12REACTIVE-CK, 12REACTIVECK, 12REACTIVE CK, 12REACTIVE-EKS, 12REACTIVEEKS, 12REACTIVE EKS
- Free FedEx shipping anywhere in the US, incl. Alaska & Hawaii
- 10-year limited warranty from the manufacturer. Details
- Ships fast: orders are typically processed within 1 business day
- CertiPUR-US® certified foams (per the manufacturer)
- Real help: text John at 805-617-6878, 6 AM–9 PM PT
- Secure checkout by Stripe. Card or pay over time with Klarna. Purchase Policy & Warranty
Not sure which one? Take the 1-minute Mattress Finder to see your best match (you can text the results to John), or compare every model on the comparison chart. · Purchase Policy & Warranty
Same factory-made quality for less. Why our prices are lower
Call or text 805-617-6878, 6 AM–9 PM PT.
All mattress sizes & prices
| Mattress Size | Regular | Our price |
|---|---|---|
| Twin XL - 80"L x 38"W | $489 | |
| Full - 75"L x 54"W | $579 | |
| Queen - 80"L x 60"W | $609 | |
| King - 80"L x 76"W | $709 | |
| Cal King - 84"L x 72"W | $709 | |
| King Split - 80"L x 76"W | $1,099 |
“Regular” is the manufacturer’s suggested retail price (MSRP) for the same model, shown for comparison. It is not a price we previously charged. Learn more
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Details
Recovery is crucial for an active lifestyle. Whether you're running, working out, or playing sports, getting enough rest is essential for maintaining a healthy and active lifestyle. Quality recovery begins with quality sleep, and that starts with your mattress. Achieve optimal sleep and recovery with the 12” ActiveAlign™ Zoned Mattress, specifically designed for active individuals. The mattress features copper-gel infused memory foam, which provides maximum cooling and antimicrobial properties, promoting better sleep and recovery. Copper is an essential mineral for the body's maintenance and recovery, known for providing energy and supporting the maintenance of blood cells and the immune system.
This innovative mattress has specialty layers zoned for specific regions of the body. Each zone provides the correct amount of conformity to keep the spine in a neutral and comfortable position, while the upper torso region is infused with a cooling gel to provide a cooler night’s sleep. The Reactive Foam provides a medium-firm spine-supporting feel with great bounce-back. Additionally, the Patented Edge Support System offers a stable sitting surface and 20% more sleeping surface. The base Air Grid™ layer provides articulated cuts for enhanced breathability and flexibility when used with an adjustable base.
Mattress Layers
2” Reactive Foam: latex-like bounce back
1” Copper-Gel Infused Memory Foam: cooling with anti-microbial properties aiding in improved overall rest
Patented Edge Support System: provides side support, along with 20% more sleeping surface2" Zoned Layer of Support Foam (Head & Foot) / Plush Cooling Gel (Upper Torso) / Plush Memory Foam (Hips)
7" Air Grid™: provides a flexible but reinforced base layer with articulated cuts for added breathability and flexibility when paired with an adjustable base
- Compatible to use with an adjustable base; sold separately
Mattress Cover
The zip-off machine-washable cooling cover is easy to clean and reduces allergens when laundered.Setup
- PLACEMENT: Before opening, place the mattress on a proper surface such as a continuously solid surface, an adjustable base, or slats no more than two (2) inches apart capable of supporting the mattress and users.
- UNWRAP: Use scissors to unwrap and unroll the mattress from the plastic; DO NOT USE A RAZOR BLADE.
- EXPAND: Allow the mattress to expand. The mattress may take up to 72 hours to fully recover and return to its original shape. You can sleep on it immediately; the body heat and movement will expedite recovery.
Care Instructions
- The mattress cover is machine-washable, wash on a cold, gentle cycle with like colors, and air dry without heat.
- A mattress protector is recommended, but not required, to protect and increase the mattress's longevity. Liquid damage of any kind does not qualify for a warranty replacement. If a liquid spill occurs, remove the cover immediately and allow the area to dry before covering it with the mattress cover.
- Do not dry clean, bleach, iron, or steam.
- Rotate your mattress to give uniform wear to the sleeping surface.
- Do not stand or jump on the mattress.
- Do not fold or bend for extended periods
- Do not allow moisture to saturate the mattress.
Certifications
CertiPUR-US certified. Certified foams are made without formaldehyde, phthalates, ozone depleters, heavy metals, PBDEs, or the following Tris flame retardants: TCEP, TDBPP, TDCPP, or TEP. The foam is low VOC (Volatile Organic Compound) emissions for indoor air quality. Visit certipur.us for more information.Customer reviews (2)
5.0 on Google (2 reviews)
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5.0 out of 5
Based on 1 rating
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CarolI absolutely love my 12” ActiveAlign Reactive Copper Zoned Medium mattress from MimiJohn! It has the perfect balance of comfort and support — soft enough to feel cozy and comfortable, but supportive in all the right places. I’ve been sleeping so well on it and waking up feeling much more rested.
I’ve slept on some very expensive mattresses over the years, and I’m genuinely impressed with the quality of this one, especially for the price. The Reactive Copper and zoned support make it feel like a much more expensive mattress.
If you like a medium mattress that’s comfortable for sleeping in different positions without feeling too soft or too firm, I would absolutely recommend this one. Amazing comfort, quality and value. Five stars!
Carol MResponse from MimiJohnSo Glad you’re sleeping well Carol!!! Our Goal is luxury sleep at a reasonable price! 🛌💤 -
Veronica Verified buyerI’m absolutely thrilled with my experience at MimiJohn.com!
Last year, I decided to try the standard Copper mattress for our guest bedroom. To my surprise, on those restless nights when I couldn’t sleep in my main bedroom, I’d sneak in there and end up getting the best rest I’d had in ages. (better even than my Purple mattress!)
The quality was outstanding, and the price was such an incredible value that I couldn’t believe it.
My husband finally got tired of my midnight escapes and said, “Just get us a new mattress already!” So I came back to MimiJohn and upgraded to the Cal King Active Copper and wow, it’s even better than the original Copper! We’re both sleeping deeper and waking up more refreshed than ever before.
The old Purple mattress has now been happily donated to my niece for her room, and our bedroom has become our true sanctuary.
I’ll admit, I was a little skeptical at first and even reached out to the owner last year to make sure everything was legitimate. It absolutely is — this company delivers real quality, and I’m so glad I found them.
Next on my list? An adjustable base once our tax refund hits in April. Can’t wait!
If you’re on the fence about a new mattress, do yourself a favor and check out MimiJohn.com — you won’t regret it!
-Veronica H.