A 430 thread-count brushed Egyptian poly-cotton casing makes the silky softness & feel of our duvet unmatched.The 650FP feathers & down content makes a lightweight, but very insulating duvet thanks to the lofty down clusters.Feathers down is a real treat to sleep under - marshmallowy soft and beautiful light.We use responsibly harvested down feathers to ensure the duvet insert is cruelty-free, high cleanness, and odorless.