Tempur

Tempur makes viscoelastic foam mattresses and bedding, including duvets sized for children. We list them for durability rather than material purity: the foam is petrochemical, but a Tempur mattress is designed to hold its support for well over a decade, which is where most of the environmental cost of a mattress actually sits. Look for the take-back and recycling options in your country, and treat the long warranty as part of the assessment.