Mattress, sheets, duvet
Avoid so-called wrinkle-resistant laundry which is treated with chemicals. Some wools are treated with moth repellants that are difficult to remove.
Healthy alternatives
Bedding made of 100% natural fibres such as cotton, hemp, linen…
DIY
The same washing technique can be applied as for clothing.
You can buy fabric by the metre to make your own bedding without chemicals. Here are some examples.
Materials to avoid in products you choose
Formaldehyde: carcinogen, irritant to eyes and respiratory tract, respiratory sensitizer
Foams: release VOCs
Plastics (polyester): may contain hydrocarbons, phthalates and bisphenol A which are endocrine disrupters
Flame retardant chemicals: toxic to humans, release VOCs, possible toxic effects on the nervous and hormonal systems
Dyes: possible carcinogens, skin sensitizers, photosensitizers and mutagens