This Cool Breathe Pillow is made with 52% polyester/48% nylon which draws out heat and moisture improving comfort for a great night sleep all year round. The gusset is made with 180gsm, 100% polyester sandwich mesh enhances air ventilation and diverts head away from your head. The 1300g foam/microfibre blended fill gives great support, whist being extremely lofty and soft. It is this balance in the design that makes Cool Breathe a perfect year-round pillow.