Centre d'assistance
(877) 475-7768
csr@mlilyusa.com
Updated
For couples who want to adjust their side of the bed independently, there are two main split setups: a split head king, which uses one king mattress divided only at the head, and a split California king, which uses two separate mattresses on a split base. A split head king lets each person raise their own head while sharing one continuous surface where your legs and feet are, so there's no gap down the middle of the whole bed. A split Cal king gives each person fully independent head and foot control. From MLILY, the WellFlex ICE Split Head King mattress ($3,099) paired with the MS300 adjustable base ($2,099) is a complete split head setup, and the MS300 also comes in a Split Cal King size.
One partner wants to sit up and read while the other sleeps flat. One snores and needs their head raised, the other doesn't. A split adjustable bed solves this, but there are a few kinds, and the mattress has to match the base. This guide explains the options and how to choose.
Key takeaways
- A split head king is one king mattress split only at the top, so each person raises their own head and you share the foot of the bed.
- A split king or split Cal king uses two separate mattresses, so each person controls their own head and foot.
- The mattress must match the base: a split head base needs a split head mattress.
- The MLILY WellFlex ICE Split Head King has a 34-inch split at the head and cooling ActiveTemp™ PCM, and pairs with the MS300 base.
- The MS300 adds massage, Zero Gravity and Anti-Snore modes, USB charging and under-bed lighting, and is also available in Split Cal King.
Split head king vs. split king vs. split Cal king
| Configuration | Mattress | What each sleeper controls | Gap down the middle? | Sheets |
|---|---|---|---|---|
| Split head king | One king mattress, split only at the head | Their own head; the foot moves together | Only at the head | Split head (split top) king sheets |
| Split king | Two Twin XL mattresses (38" x 80" each) | Their own head and foot | Full length | Split king set or two Twin XL fitted sheets |
| Split California king | Two 36" x 84" mattresses | Their own head and foot | Full length | Split Cal king set |
| Standard king | One king mattress | Nothing separately | No | Standard king |
On a fully split bed, both halves need to be the same mattress height so the surface stays level. The length of the split on a split head mattress varies by brand. MLILY's is 34 inches.
Which split setup is right for you?
| Choose a split head king if... | Choose a split Cal king if... |
|---|---|
| You mostly want to raise your heads separately, for reading, TV or snoring | You each want to control your own head and foot |
| You want a connected surface at the foot, with no gap where your legs are | You want two separate mattresses, possibly in different firmness levels |
| You both like the same mattress firmness | You're tall and want the extra length of a California king |
| You like to share the middle of the bed | You want the most independent motion and position control |
What to look for in a split mattress
- Match the mattress to the baseA split head base needs a split head mattress. A fully split base needs two separate mattresses in the matching size.
- Choose a flexible buildMemory foam and hybrids with individually pocketed coils bend smoothly as the base moves. Traditional innerspring mattresses usually don't.
- Match the heights on a fully split bedIf you use two separate mattresses, they must be the same height so there's no ledge in the middle.
- Pick a firmness for how you sleepSide sleepers usually want a plusher feel, while back and stomach sleepers often prefer firmer support.
- Think about temperatureTwo people share more body heat. Cooling covers and phase-change materials help if either of you sleeps hot.
MLILY WellFlex ICE Split Head King
The WellFlex ICE Split Head King is a king mattress with a 34-inch split at the head. Each head section adjusts on its own, while the lower surface stays one connected piece. MLILY's tagline sums it up: "Adjust separately, sleep connected."
| Mattress price | $3,099 (Firmer 1.0 or Plusher 3.0) |
|---|---|
| Recommended base | MLILY MS300 Adjustable Base, $2,099 |
| Mattress and base together | $5,198 |
| Size | King, with a 34-inch split at the head |
| Cooling | Enhanced Cooling Knit Fabric Cover, Gel AeroFusion® Memory Foam with ActiveTemp™ PCM |
| Firmness | Firmer 1.0 for a more stable feel with gentle contouring; Plusher 3.0 for softer, enhanced contouring |
| Warranty | 10-year limited warranty |
| Shipping | Free shipping |
Why it works for couples:
- Independent heads: one person can sit up to read or raise their head to reduce snoring while the other sleeps flat.
- No gap at the foot: the connected lower section means you're not lying across a seam, and you can still meet in the middle.
- Cooling for two: ActiveTemp™ PCM absorbs and releases heat as temperatures change, and the knit cover is cool to the touch.
Already have a split head adjustable base? MLILY also sells the WellFlex ICE Split Head King mattress on its own for use with an existing split head base.
MLILY MS300 Adjustable Base and Split Cal King
The MLILY MS300 Adjustable Base is MLILY's recommended base for the WellFlex ICE Split Head King, and it also comes in a Split Cal King size for couples who want fully independent sides.
| Adjustment | Head and foot elevation with a wireless remote |
|---|---|
| Presets | Zero Gravity and Anti-Snore modes, plus saved position presets |
| Massage | Three modes with preset intensity levels and timer controls |
| Extras | USB charging ports and LED under-bed lighting |
| Setup | Adjustable 3-in-1 legs and tool-free assembly |
| Split sizes | Split Head King (with the WellFlex ICE Split Head King) and Split Cal King |
| Price | $2,099 for the split head setup and for Split Cal King |
MS300 in Split Cal King: a Split Cal King base gives each sleeper complete control over their own head and foot, plus their own massage. It holds two 36" x 84" mattresses. Ask an MLILY retailer which MLILY mattresses are available in split Cal king halves for this base.
For a deeper look at what each position does, from Zero Gravity to Anti-Snore, see 3 benefits of using an adjustable bed base.
Sheets and bedding for split beds
- Split head king: use split head (also called split top) king sheets, where the fitted sheet is divided at the top to match the mattress.
- Split Cal king: use a split Cal king sheet set with two fitted sheets.
- Mattress protectors: choose one designed for your split configuration, so it moves with each section of the base.
- Comforter: a standard king or California king comforter covers the whole bed.
A tip from the MLILY team: if one of you snores, set the Anti-Snore mode on that side of the split head king and save it as a preset. The snorer gets a gentle head lift, and the other person can stay flat, all on one connected mattress.
Frequently asked questions
What is a split head king mattress?
A split head king is one king mattress with a divided upper section and a connected lower section. Each person can raise their own head, while the foot of the bed moves together. The MLILY WellFlex ICE Split Head King has a 34-inch split at the head.
What's the difference between a split king and a split head king?
A split king uses two separate Twin XL mattresses, so each side controls its own head and foot. A split head king uses one king mattress split only at the top, so each person raises their own head while sharing a connected surface at the foot.
What base goes with the WellFlex ICE Split Head King?
MLILY recommends the MS300 Adjustable Base in the split head king size, which lets each person adjust their side separately and adds massage, Zero Gravity and Anti-Snore modes, USB charging and LED under-bed lighting.
How much does the WellFlex ICE Split Head King cost?
The mattress is $3,099 in Firmer 1.0 or Plusher 3.0, and the recommended MS300 base is $2,099, for $5,198 together on mlilyusa.com.
Does the MS300 come in Split Cal King?
Yes. The MLILY MS300 Adjustable Base is available in Split Cal King, which holds two 36-inch by 84-inch mattresses so each person controls their own head and foot.
Do split head king beds need special sheets?
Yes. Use split head, or split top, king sheets with a fitted sheet divided at the top to match the mattress.
Adjust separately, sleep connected
Get the WellFlex ICE Split Head King and MS300 base for $5,198, or try them at one of more than 1,500 MLILY retail locations.
Sources
- MLILY USA, WellFlex ICE Split Head King Mattress & Base and MS300 Adjustable Base.
