Diamond Mattress Transformation Medium
Transformation Medium is part of the Diamond Mattress lineup. Fourth-generation California manufacturer with a strong natural lineup.
Diamond Mattress Queens run $899–$3,499 (mid to premium). Model-specific pricing varies by retailer and sale.
Medium-firm, roughly 6–7 / 10 based on the firmness designation in the model name.
Construction
This model's name doesn't encode its materials, and we haven't tested it in our lab.
For construction detail, start with the Diamond Mattress brand hub or our mattress types guide, which explains how foam, latex, hybrid, and innerspring builds differ in feel and durability.
Diamond Mattress signature technology
- Natural Latex and Wool Comfort Layers: Certified latex with wool batting used as a natural fire barrier instead of chemical retardants.
- Hybrid Coil Systems: Zoned pocketed coil units built in the California plant, tuned by gauge for firmness rather than by comfort-layer thickness alone.
- Closed-Loop Recycling: An in-house programme that breaks down returned and old mattresses into recoverable steel, foam and fiber.
Sizes & dimensions
| Size | Dimensions | Best for |
|---|---|---|
| Twin | 38" × 75" | Kids, bunk beds, small rooms |
| Twin XL | 38" × 80" | Tall solo sleepers, split-king setups |
| Full | 54" × 75" | Solo adults who sprawl, guest rooms |
| Queen | 60" × 80" | Most couples — the U.S. best seller |
| King | 80" × 80" | Couples with kids or pets in the bed |
| California King | 72" × 84" | Sleepers over 6'2" who need length |
Not every model is offered in every size — confirm availability with the retailer.
Where to buy
- Find a local mattress store — the fastest way to try Diamond Mattress in person before ordering.
- Current mattress coupons — brands discount hardest around Presidents' Day, Memorial Day, Labor Day, and Black Friday.
- Trial & warranty: Varies — 100 nights direct, retailer terms in store trial, 10-year limited warranty on most models warranty, free shipping on direct orders.
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