Made up of unused, out of the box comfort score (male and female average, 30%), comfort score after eight years of use (30%), stabilisation (15%), sagging (10%), sweat repellent (10%) and usage wear/damage (5%). We also assessed smell out of the box and two weeks after opening for models tested prior to May 2020. These results no longer contribute to the overall score and models tested after May 2020 do not undergo the smell assessment.
We roll a cask-shaped roller over each mattress for 30,000 cycles to simulate approximately eight years' use. Then, based on sleeping assessment in dorsal and lateral positions. Note that this is not an average of the male and female results. It's a separate test that assesses combined male and female usage of the mattresses at the same time.
Using an oscilloscope we measure the movement of the mattress after a standard impact (17.5kg), simulating the turning body of a sleeping person. We also count the number of bounces up and down before the mattress is calm again. Higher-scoring mattresses exhibited fewer bounces and less movement during standard impact.
We roll a cask-shaped roller over each mattress for 30,000 cycles to simulate usage of approximately eight years. Then, we measure height and firmness straight out of the box, and again after this test to note any differences. Models with a higher score showed limited signs of sagging over time. Lower scoring models show increased sagging over time. Models with a higher score will feel almost exactly the same as they did out of the box after eight years of use.
We roll a cask-shaped roller over each mattress for 30,000 cycles to simulate approximately eight years' use. Visible damage such as cracking, broken springs or pilling contributes to fatigue score. A higher score means less damage.
Assessed after two weeks of use. A lower score means the mattress still retained packaging odour after a fortnight. Smell is no longer assessed as of May 2020. Existing smell assessments that were conducted prior to this date no longer contribute to the overall score.
Mattresses sold at traditional retail stores are often on sale or steep discounts can be obtained by haggling. This data is designed to illustrate the steep markups that are applied to mattresses by retailers and the amount you can save by waiting for a sale and asking for a deal. Bed in a box mattresses are often on sale, but they are typically sold at a lower price point so savings aren't as significant.
If applicable. Bed in a box brands offer home trial periods that range from 30 to more than 100 nights. If you're unhappy with your purchase, you can exchange the mattress for a different model (if available) or a full refund.