Hi there. Thank you for taking the time to provide your feedback. We&#39;re sorry to hear that the pillows are not as cool as you had hoped and are happy to provide some additional information.<br /><br />In general, to experience the maximum cooling benefits, we recommend pairing the pillows with bedding made of natural fibers such as cotton, linen, or hemp. Additionally, if using cotton bedding, please keep in mind that a lower thread count allows more breathability and therefore, increased cooling.<br /><br />If you believe that you are experiencing a manufacturing defect, please contact our manufacturing partners, Keeco, LLC, at 803-681-3074 or serta&#64;lkeeco.com<br /><br />We hope this information is helpful. Best, The Serta Team