| Coil Gauge |
Gauge (thickness) ranges from 12 (thick, firm) to 18 (thin, soft). A mix of gauges (zoned support) is ideal for full-body comfort. |
| Coil Count |
Higher coil counts (e.g., 800+ for a queen-size mattress) mean more precise support, but gauge and zoning matter more than raw count alone. |
| Fabric Sleeve Quality |
Look for thick, tear-resistant sleeves (e.g., 100% polyester or cotton-poly blends) to prevent fraying and coil damage. |
| Steel Type |
Tempered steel coils are more durable and springy than standard steel—they resist sagging and maintain tension longer. |
| Zoning Design |
Check if the core has targeted zones (e.g., firm lumbar, soft shoulder/hip) to match your sleep position (side, back, stomach).
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