100% Polyester Serta - Rest easy with a brand you can trust. Serta’s heated mattress pad is ETL certified and independently tested to meet the highest safety standards. With decades of experience and hands on expertise, Serta is a true champion of comfort for all Luxurious Comfort - Serta plush heated mattress pad offers luxurious soft and cozy plush fabric while always keeping your mattress clean and fresh. Serta electric bed warmer fits most premium mattresses, up to 17" thickness Dual Control - Queen and larger sizes come with dual zone temperature capability and 2 controllers to adjust temperature independently. Delivers heat ranging from 78 - 98℉ (temperature range will vary based on current ambient room temperature). Conveniently machine washable Multifunctional - Serta heating electric mattress pad features smart technology to keep your bed warm. Equipped with 10 heat settings and a 1-12 hour auto shut off safety timer that you can set in 1 hour increments up to 12 hours max Includes - 1 Heated Mattress Pad:78"W x 80"L + 15"D. DO NOT LEAVE CONTROLLER COVERED WHEN IN USE TO AVOID OVERHEATING