| go underneath the mattr… | 0.68 |
| present added layer of … | 0.58 |
| give supplementary laye… | 0.35 |
| absorb shock | 0.32 |
| feature low profile | 0.32 |
| support the mattress | 0.28 |
| eliminate the need | 0.25 |
| covered in organic cott… | 0.50 |
| designed to work with t… | 0.42 |
| required | 0.38 |
| replaced | 0.29 |
| discarded in case | 0.26 |
| used without the suppor… | 0.25 |
| mounted on caster | 0.25 |
| cut | 0.25 |