100 cotton cover features a breathable percale weave which increases airflow so youre always sleeping cool Innovative pillowinpillow design packed with microfiber fill provides both support and comfort Removable machinewashable outer layer for easy cleaning 2 gusset serves as the backbone of our pillows construction This allows for better neck alignment and an evenly distributed fill Resistant to clumping meaning it can bounce back with just a quick fluff Packaging may vary