Quick verdict
The Helix Kids is a flippable hybrid mattress offered in twin and full sizes. Its two sides have different feels, and families can choose a standard or lower profile. This guide covers the current options, buying terms and the practical safety checks for a child’s bed.
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Our verdict
The Helix Kids is worth considering if you want a two-sided mattress that can provide different feels as your child grows. The lower profile offers another option for a compatible bunk or trundle. Compare the actual frame requirements, cover, price and return terms before choosing a configuration.
How the two sides work
Helix describes the firmer side for ages 2–7 and the softer side for ages 8 and up. These are the manufacturer’s guidelines; follow the label on the model you receive. A child’s comfort and the fit of the bed frame still matter. The mattress is designed for a child’s bed, not for use as an infant crib mattress.
For infants, the American Academy of Pediatrics advises a separate, firm, flat sleep surface in a crib, bassinet or play yard that meets applicable safety standards, with no loose bedding or soft objects.
6-inch vs. 8-inch models
| Option | What Helix lists | Check before buying |
|---|---|---|
| 8-inch standard | Flippable hybrid with a standard water-repellent cover. | Bed height, frame fit and selected cover. |
| 8-inch with cooling | Cooling fabric on the older-child side. | Helix says that cooling surface is not water- or stain-repellent. |
| 6-inch low profile | A shorter flippable option for bunk or trundle use. | The bed manufacturer’s maximum mattress height and guardrail clearance. |
Helix lists twin and full sizes. Verify the exact model listing, dimensions and availability when ordering; a water-repellent finish is not the same as a waterproof protector.
Bunk and frame safety
Follow the bunk-bed manufacturer’s mattress-size and maximum-thickness label; a 6-inch mattress is not automatically compatible with every bunk. The CPSC requires upper-bunk guardrails to extend at least five inches above the mattress. Children under six should not use the upper bunk. Use the correct guardrails, ladder and hardware, and check the bed for recalls.
Use a sturdy, properly supported foundation as specified by Helix. Check the overall height and accessibility of a standard bed as well, and choose a fitted protector compatible with the mattress and the child’s bed.
Materials and cleaning
Helix describes foam comfort layers on either side of individually wrapped coils. Cover and cooling options vary with height and configuration. Helix says the mattress is not made with organic materials; its certifications address specific material or emissions standards, rather than meaning the bed is chemical-free.
Check the care instructions for the exact cover. Do not assume every cover is removable or machine washable. For accidents, a separate fitted waterproof protector can make cleanup easier; choose one appropriate for the mattress and the child’s age.
Yawnder test results
The existing Yawnder scoring record is dated August 26, 2026 and lists an eight-inch model. The record does not identify a child’s age or which side was evaluated, so use these scores alongside the fit and safety information above.
Yawnder test results: Helix Kids Mattress
8.7/10 overall
Scored on the same rubric we use for every mattress — how we test and score · compare these numbers against every mattress we score.
Price, trial and warranty
Price varies with size, height, cover and promotion. Helix currently advertises a 365-night trial for qualifying direct purchases of the Kids mattress and a limited lifetime warranty for eligible recent purchases; older purchases follow their original terms. Read the written conditions and any break-in requirements.
Eligible mattresses purchased from Yawnder have a 100-night trial with a 30-night minimum and a $200 refund processing fee, waived for eligible exchanges; restrictions apply. See Yawnder’s return policy and confirm the terms for your order. Helix-direct purchases follow Helix’s separate trial. See current Helix Kids pricing. For showroom availability, contact Yawnder in Encinitas before visiting.
Frequently asked questions
Which side should face up?
Helix labels the firmer side for ages 2–7 and the softer side for ages 8 and up. Check the label and instructions on the mattress.
Can an infant use it?
This is a twin or full child’s mattress, not a crib mattress. Follow pediatric safe-sleep guidance for infants.
Is the 6-inch version safe for every bunk bed?
No. Follow the bunk’s mattress dimensions and thickness limits, use guardrails, and check that the guardrails are at least five inches above the mattress. Children under six should not use the upper bunk.
Is the mattress waterproof?
The standard cover is described as water-repellent, not waterproof. Helix says the cooling cover on the older-child side is not water- or stain-repellent.
Can I wash the cover?
Follow the label on the specific model. Do not assume it can be removed or machine washed; a separate washable protector can be useful.
Standardized test data
Every mattress in the current program follows the same rubric and order, combining instrument-measured categories with hands-on evaluations so scores are comparable across brands.
| Measurement | Result | How to read it |
|---|---|---|
| Firmness | 6.5 | 1–10 scale (6.5 = medium-firm) |
| Construction | Hybrid | Foam / hybrid / latex / airbed |
| Profile height (Yawnder measured) | Not measured | inches — measured on our own sample |
| Motion transfer | 8.7 | score /10 — higher is less disturbance |
| Edge support | 7.8 | score /10 — sitting and sleeping edge |
| Temperature | 9.2 | score /10 — higher sleeps cooler |
| Pressure relief | 8.7 | score /10 — shoulder and hip |
| Spine alignment | 9.2 | score /10 — neutral posture |
| Ease of movement | 8.3 | score /10 — repositioning speed |
| Expected durability | 8.7 | score /10 — projected 5-year hold |
| Off-gassing | 8.7 | score /10 — higher is less smell |
| Queen price | Not measured | MSRP before seasonal discounts |
| Yawnder purchase terms | 100 nights | when bought from Yawnder; 30-night adjustment period applies |
| Manufacturer sleep trial | 365 nights (Helix direct) | when bought direct from the brand |
| Manufacturer warranty | Limited Lifetime Warranty | as published by the manufacturer; applies wherever you buy |
| Last test date | August 26, 2026 | date of our most recent standardized test session |
| Specs last verified | September 10, 2026 | layer specs checked against the manufacturer — Current Helix redesign (2025) |
How this score is built
Support and spine alignment 25% · pressure relief 20% · temperature 15% · motion transfer 15% · edge support 10% · durability 10% · value 5%. Scores come from standardized instrument measurements and structured hands-on evaluations using the same Yawnder testing rubric. Read the full rubric.
What’s inside the Helix Kids 8"
Layer-by-layer construction as published by the manufacturer, listed from the sleep surface down. Foam density describes how much material is in a layer (a durability signal); IFD/ILD describes how soft or firm that foam feels. Density is never used as a feel measurement. Current generation: Current Helix redesign (2025). Specs verified against the manufacturer’s published construction on September 10, 2026.
| Layer | Material | Thickness | Density | IFD / ILD | Coil gauge |
|---|---|---|---|---|---|
| Comfort layer | memory foam (older-child side: softer Gel Memory Foam) | 1" | 2.4 lb/ft³ | Not published | Not published |
| Support coil unit | zoned pocketed coils14.75/15.5 gauge (interior 14.75 / edge 15.5; reinforced side coils) | 6" | Not published | Not published | 14.75 gauge |
| Comfort layer | polyfoam (younger-child side: firmer Helix Responsive Foam) | 1" | 1.5 lb/ft³ | Not published | Not published |
Support system
- Core type: Pocketed coil
- Coil type: Individually wrapped
- Coil height: 6"
- Interior gauge: 14.75 gauge
- Perimeter gauge: 15.5 gauge
- Zoned support: No
- Edge reinforcement: Reinforced side coils
Construction figures are manufacturer-published specifications, not Yawnder measurements. They are recorded separately from our test scores and never replace them. How we test and score.
Find a better mattress for you
Use Yawnder's standardized test data to compare this mattress with other models, or answer a few questions and narrow the field by sleep position, feel and priorities.
Compare before you buy
Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 84 hold a complete standardized record and 41 a partial standardized record.