The short answer: Purple if you sleep hot or dislike foam and want pressure relief that does not feel like sinking. Casper Original Hybrid if lower back pain is the main issue and you want zoning and a conventional feel. Purple's Amazon listing does not state trial terms; Casper's states 100 nights.

Purple Mattress (Original)
The grid bed: a rubbery polymer lattice that collapses under the shoulder and hip but pushes back under the waist.
Open the Amazon listing
Casper Original Hybrid
A medium hybrid whose main idea is zoning: softer at the shoulders, firmer under the waist and lower back.
Open the Amazon listing| Purple Mattress (Original) | Casper Original Hybrid | |
|---|---|---|
| Top layer | 2 in GelFlex Grid | Open-cell foam |
| Core | Foam | Encased coils |
| Firmness | Medium-Firm (4 of 5, maker) | Medium |
| Zoning | No | Yes |
| Heat | Cool (open grid) | Cool-ish (open-cell foam, coils) |
| Trial | Not stated on listing | 100 nights |
| Sold by | Purple Innovation | Amazon.com |
How each one feels
Purple's grid is the unusual one: a lattice of soft polymer that buckles under pointed pressure (a shoulder, a hip) and holds firm under broad pressure (your back). Air moves through it easily. Some people love it immediately; others find the texture strange. Casper feels like a conventional modern foam hybrid, with zoning doing quiet work underneath.
Pick Purple if
- Foam leaves you hot.
- You want pressure relief for shoulders and hips without sinking.
- You are curious about the grid and willing to use a return if it does not suit you.
Pick Casper if
- Lower back pain is your main problem.
- You want a conventional feel.
- You want trial terms written on the listing.
Still choosing? Reader questions
Is Purple good for back pain?
For many side and combination sleepers, yes; the grid relieves pressure at shoulders and hips while supporting the waist. Its Amazon listing rates it medium-firm.
We write about mattresses, not diagnoses. Numbness, leg weakness, bladder or bowel changes, or pain after a fall are reasons to see a doctor, not reasons to shop. Full disclaimer.