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Choose the WellFlex ICE if you sleep hot or want a thicker, more cushioned memory foam mattress. Choose the WellFlex if you want sustainable, pressure-relieving memory foam at a more accessible price. Both are all-foam mattresses made with breathable BioBreeze™ Memory Foam and come in Firmer 1.0 and Plusher 3.0. The 14" WellFlex ICE adds 2 inches of cooling foams, an Enhanced Cooling Knit Fabric Cover and Gel AeroFusion® Memory Foam with ActiveTemp™ phase change material (PCM) for more temperature regulation than the 12" WellFlex.
WellFlex and WellFlex ICE share the same foundation: contouring memory foam, sustainable materials and two feel options. The difference comes down to two questions: how hot do you sleep, and how much cushioning do you want? This guide breaks it down so you can choose with confidence.
Key takeaways
- Both are all-foam memory foam mattresses made with breathable BioBreeze™ Memory Foam, which contains at least 30% bio-based carbon.
- WellFlex is 12" thick. WellFlex ICE is 14" thick, with 2 more inches of cooling foams.
- WellFlex ICE adds an Enhanced Cooling Knit Fabric Cover and ActiveTemp™ PCM to absorb and release body heat.
- Both come in Firmer 1.0 for back and stomach sleepers and Plusher 3.0 for side sleepers.
- WellFlex comes in six sizes, including Twin and Full. WellFlex ICE comes in Twin XL, Queen, King, California King and Split Head King.
The quick verdict
Choose WellFlex if you:
- Sleep at a comfortable temperature or only slightly warm
- Want sustainable memory foam at a more accessible price
- Need a Twin or Full size
- Prefer a 12" profile
Choose WellFlex ICE if you:
- Wake up hot, sweaty or kicking off the covers
- Love memory foam but hate sleeping warm
- Want more cushioning and pressure relief
- Want a Split Head King for an adjustable base
WellFlex vs WellFlex ICE side by side
| WellFlex | WellFlex ICE | |
|---|---|---|
| Type | All-foam memory foam | All-foam memory foam |
| Profile | 12" | 14" |
| Cover | Comfort Knit Fabric Cover made with organic, recycled materials | Enhanced Cooling Knit Fabric Cover with PCM-coated threads, exclusive to ICE mattresses |
| Top comfort layer | BioBreeze™ Memory Foam (Firmer 1.0) or Gel AeroFusion® Memory Foam (Plusher 3.0) | 1.5" Gel AeroFusion® Memory Foam with ActiveTemp™ PCM |
| Cooling technologies | Breathable BioBreeze™ foam, plus gel-infused foams in Plusher 3.0 | ActiveTemp™ PCM, gel-infused foams and the cooling cover |
| Feel options | Firmer 1.0, Plusher 3.0 | Firmer 1.0, Plusher 3.0 |
| Sizes | Twin, Twin XL, Full, Queen, King, California King | Twin XL, Queen, King, California King, Split Head King |
| Motion isolation | Excellent, thanks to all-foam construction | Excellent, thanks to all-foam construction |
| Best for | Sustainable memory foam comfort at a more accessible price | Hot sleepers who want memory foam and maximum cushioning |
| Warranty and shipping | 10-year limited warranty, free shipping | 10-year limited warranty, free shipping |
The 4 key differences between WellFlex and WellFlex ICE
1. Cooling
This is the biggest difference. WellFlex uses breathable BioBreeze™ Memory Foam to improve airflow and reduce heat retention. WellFlex ICE goes further. Its Enhanced Cooling Knit Fabric Cover feels cool the moment you lie down, and its top layer of Gel AeroFusion® Memory Foam is powered by ActiveTemp™ PCM, which absorbs excess heat as you warm up and releases it as you cool down to keep the sleep surface in a more comfortable range all night.
2. Cushioning and thickness
WellFlex ICE starts with everything in the WellFlex, then adds 2 more inches of cooling foams, bringing it from 12" to 14". In the Plusher 3.0, that includes a thicker BioBreeze™ layer, Liquid Gel CoolFlex™ Foam and an egg-crate Flex Comfort Foam for extra plushness and airflow.
3. Sizes
Need a Twin or Full? WellFlex comes in all six standard sizes. WellFlex ICE comes in Twin XL, Queen, King and California King, plus a Split Head King, which is a great match for couples using a split adjustable base.
4. Price
WellFlex ICE is the premium step up. WellFlex is designed to deliver supportive comfort, sustainable materials and cooling performance at a more accessible price point. Check each product page for current pricing.
Firmer 1.0 or Plusher 3.0?
Both WellFlex models come in the same two feels, and the right one depends on how you sleep.
| Firmer 1.0 | Plusher 3.0 | |
|---|---|---|
| Feel | Structured support with minimal sink | Deeper contouring and pressure relief |
| Best sleep positions | Back and stomach sleepers | Side sleepers |
| Comfort layers | BioBreeze™ Memory Foam over Performance Memory Foam (ICE adds Gel AeroFusion® with ActiveTemp™ PCM on top) | Gel AeroFusion® Memory Foam, BioBreeze™ Memory Foam, Liquid Gel CoolFlex™ Foam and Flex Comfort Foam |
| Choose it if | You want to feel lifted and supported | You want to sink in and feel cradled |
Not sure which feel fits? Read our guide on sleep positions and support, or try both feels side by side at a local retailer.
5 questions to help you decide
- Do you wake up hot or sweaty at least a few nights a week?Yes: WellFlex ICE. No: WellFlex.
- Have you avoided memory foam because it sleeps warm?Yes: WellFlex ICE was built for you.
- Do you want maximum cushioning at the shoulders and hips?Yes: WellFlex ICE Plusher 3.0. Somewhat: WellFlex Plusher 3.0.
- Do you need a Twin, Full or Split Head King?Twin or Full: WellFlex. Split Head King: WellFlex ICE.
- Is getting the lowest price your top priority?Yes: WellFlex. If cooling matters more: WellFlex ICE.
Prefer more bounce? If you like the cooling of WellFlex ICE but want the lift and airflow of springs, compare it with the Midnight ICE Hybrid in our Midnight vs Midnight ICE guide.
Frequently asked questions
What is the difference between WellFlex and WellFlex ICE?
WellFlex is a 12" memory foam mattress. WellFlex ICE is 14" and adds 2 inches of cooling foams, an Enhanced Cooling Knit Fabric Cover and ActiveTemp™ phase change material for enhanced temperature regulation.
Is WellFlex ICE worth it?
If you sleep hot or want extra cushioning, yes. If temperature is not a problem for you, the WellFlex offers the same sustainable BioBreeze™ memory foam comfort at a more accessible price.
Is WellFlex ICE good for hot sleepers?
Yes. It is the cooling version of WellFlex, pairing a cooling cover with ActiveTemp™ PCM and breathable BioBreeze™ Memory Foam to pull heat away from the surface.
What is BioBreeze™ Memory Foam?
BioBreeze™ is MLILY's reengineered AeroFusion® Memory Foam made with at least 30% bio-based carbon, making it a more sustainable choice while keeping its breathability and comfort.
Which is better for side sleepers?
Both work well in the Plusher 3.0 feel. Choose WellFlex ICE Plusher 3.0 if you also sleep hot or want the most pressure relief at the shoulders and hips.
Are WellFlex mattresses good for couples?
Yes. Both are all-foam mattresses, which absorb movement well, so you are less likely to feel your partner toss and turn.
Feel the difference in person
Lie down on WellFlex and WellFlex ICE side by side and talk with a trained sleep specialist at one of more than 1,500 MLILY retail locations nationwide.
