These new dust mite proof pillows contain 85% white goose feather and 15% down by weight. The casing is dust mite proof 100% cotton cambric. All products are Oeko-tex Standard 100 and carry the Nomite certification. All the feathers and down are washed to ensure that they are clean and then thoroughly rinsed. The drying process ensures that the feathers and down are sterilised as the temperature must reach 120oC.