Helix Sleep firm: classic spinal support, modern build quality.
The Helix Plus Firm Hybrid Mattress for Plus Size Sleepers is a firm pocketed-coil hybrid mattress built for back and stomach sleepers, and plus-size sleepers. Helix builds each mattress to the sleep profile it's named for, with individually wrapped coils for motion isolation and a CertiPUR-US foam comfort system. At 11.5", it sits in the standard profile range — generous enough for adjustable bases yet still easy to sheet.
- Back and stomach sleepers
- Plus-size sleepers needing lift
- Sleepers with chronic lower-back pain
- Hot sleepers (less foam to trap heat)
- Side sleepers under 150 lb (shoulder pressure)
- Sleepers wanting cushioned pressure relief
Each coil moves on its own, so a partner getting up doesn't roll you out of position.
Individually wrapped coils flex independently for support that responds to your body, not the other way around.
A reinforced center third keeps the spine aligned across every position.
We deliver, set up in your bedroom, and haul away your old mattress — no extra charge.
Engineered for medium-firm support.
A 7/10 firmness — gentle support without sinking. Good for back and combination sleepers, plus side sleepers over 200 lb.
5 layers, working together.
Built for adaptive support and breathability. Every layer is hand-checked before it ships from our warehouse.
- L01Stretch-knit quilted coverWicks heat and feels soft to the hand — a quality-tier finish.
- L02Gel memory foam comfortPressure-relieving foam infused with gel for cooler contact.
- L03Transition foamBridges the soft top into the coil unit so you never bottom out.
- L04Pocketed-coil support unitIndividually wrapped coils that flex independently for spinal alignment and motion isolation.
- L05High-density base foamAnchors the coil unit and reinforces edge support.
The details.
- Type
- Hybrid Mattress
- Sizes
- Twin, Twin XL, Full, Queen, King, Cal King
- Brand
- Helix Sleep
About this mattress
Helix Plus 11.5" Firm Hybrid Mattress for Plus Size Sleepers
Helix Sleep was founded in New York City by a team of engineers and product designers who were frustrated with the mattress industry’s one-size-fits-all approach. They asked a simple question: if people are different sizes, sleep in different positions, and have different pressure-relief needs, why does everyone buy the same mattress? Their answer was a lineup of hybrid mattresses designed around specific sleep profiles — each model engineered for a particular combination of body type, sleeping position, and firmness preference. Helix’s Sleep Quiz has matched millions of sleepers to their ideal mattress using data-driven recommendations based on sleep science research. Every Helix mattress is designed in New York and manufactured in Phoenix, Arizona, using CertiPUR-US certified foams. All materials are tested for quality and safety, and every mattress comes with a limited lifetime warranty — one of the strongest warranties in the industry — plus a 120-night sleep trial.
Technology & Construction
The Helix Plus 11.5" Firm Hybrid Mattress for Plus Size Sleepers is a hybrid mattress built around individually wrapped coils and responsive comfort foam. Each coil in the system is independently wrapped, meaning it compresses and responds to pressure independently of the coils around it. This provides three key benefits: targeted support that adapts to different body weights across the sleep surface, excellent motion isolation so partner movements don’t transfer across the bed, and continuous airflow through the open coil structure for cooler sleep. The comfort foam layer on top of the coils is configured specifically for the Plus’s firm profile. The Standard tier at 11.5 inches is the accessible entry point to the Plus profile, delivering the same firmness feel and coil system as the Luxe and Elite at the most accessible price. Reinforced foam encasement around the perimeter provides edge-to-edge stability and maximizes the usable sleep surface for both solo sleepers and couples.
Who This Mattress Is Best For
Helix’s Sleep Quiz recommends the Plus for sleepers who prefer firm support, sleep primarily on their back or stomach, and want a cooler sleep surface. The firm comfort layer keeps you on top of the mattress with minimal sinkage, maintaining neutral spinal alignment for back sleepers and preventing the midsection from dropping for stomach sleepers. The individually wrapped coils provide responsive support without the slow-sinking feeling of memory foam. Couples benefit from excellent motion isolation — your partner’s movements stay on their side of the bed.
Why Shop at LA Mattress Store
As an authorized Helix Sleep dealer, LA Mattress Store carries the complete Helix lineup in all five of our Los Angeles showrooms — Glendale, West LA, Hancock Park, Koreatown, and Studio City. Walk in any time during business hours to try this mattress in person. Our sleep consultants can help you compare firmness levels, construction types, and find the right mattress for your sleep style and budget. Every purchase includes free White Glove delivery anywhere in the Los Angeles metro area — our team delivers to your room of choice, sets up the new mattress, and removes your old one at no extra cost. Same-day delivery is often available. Helix offers a 120-night sleep trial and a limited lifetime warranty. LA Mattress Store coordinates all warranty claims on your behalf. We also offer 0% APR financing for qualified buyers, making it easy to invest in better sleep without paying the full amount upfront.
Available Sizes
Helix Plus 11.5" Firm Hybrid Mattress for Plus Size Sleepers is available in Twin, Twin XL, Full, Queen, King, Cal King. Queen starts at $1,499. All sizes include free White Glove delivery in Los Angeles.
Have questions? Call us at (800) 218-3578 or visit any of our 5 Los Angeles showrooms to try it in person.
