What are they made of? Simba - Odyssey July 20, 2018 12:27 Follow Each pillow has a 70% duck feather and 30% duck down filling, lovingly encased in a 100% cotton cover. Related articles Where are these made? Is the down ethically sourced? How does this pillow compare to the Hybrid range? Are you environmentally friendly and is the mattress vegan? Are there any allergens I should be aware of? Can you make bespoke mattresses?