Quick verdict
What’s inside the Helix Twilight
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 |
|---|---|---|---|---|---|
| Quilted top | quilted comfort layer / Gel Memory Foam | 0.75" | 1.8 lb/ft³ | 10 IFD | Not published |
| Comfort layer | memory foam / Gel Memory Foam | 1" | 2.4 lb/ft³ | 11 IFD | Not published |
| Transition layer | polyfoam / Responsive Foam | 0.75" | 1.8 lb/ft³ | 36 IFD | Not published |
| Transition layer | polyfoam / Responsive Foam | 0.75" | 1.5 lb/ft³ | 52 IFD | Not published |
| Support coil unit | zoned pocketed coils14.75/15.5 gauge (interior 14.75 / edge 15.5) | 8" | Not published | Not published | 14.75 gauge |
Support system
- Core type: Pocketed coil
- Coil type: Individually wrapped
- Coil height: 8"
- Coil steel: Tempered
- Interior gauge: 14.75 gauge
- Perimeter gauge: 15.5 gauge
- Zoned support: No
- Edge reinforcement: Reinforced long sides
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.
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