Ottomanson 9" Firm
Top PickWhat We Like
- Uncompromising firmness that back and stomach sleepers say relieves morning back pain.
- Surprising comfort and support at a budget-friendly price.
- Arrives with virtually no chemical off-gassing smell.
Worth Noting
- Edge support can soften and sag after several months of regular use.
- Firmness
- Firm
- Thickness
- 9 inches
- Coil Type & Count
- Encased, 480
Read the full review
The 480 individually wrapped coils and 9-inch firm profile create a surface that back and stomach sleepers praise for morning relief. No off-gassing odor out of the box means it’s ready for a child’s room or guest bunk immediately, and the build quality feels far more substantial than its price suggests.
This is a niche mattress: strictly for single sleepers who want a rock-hard feel—stomach sleepers, heavier users, anyone chasing a firm reset. Side sleepers should look elsewhere. Edge support can soften after months of daily use, but for bunk beds, daybeds, and occasional guest duty, that tradeoff matters little.
Bottom line: For bunk beds, daybeds, or guest rooms where rock-solid support matters more than plushness, this twin delivers—side sleepers and couples need not apply.