Polyester. Comfort and Relaxation; Pamper yourself or your loved ones with a thick spa bath pillow; measuring 14 x 13 x 4 inches our luxury bathtub pillow is twice as thick and softer than most brands; unlike skimpier spa pillows, our premium orthopedic 2-panel cushion design contours and supports your head, neck, shoulders, and lower back for relaxing comfort. Fits any Tub and Sticks; No more slipping and sliding with this bath tub pillow. Thanks to the 6 extra-large and strong suction cups, our bathtub pillow spa set holds in place on any surface; the ergonomic two-panel design is adaptable to any shape tub, spa or jacuzzi Easy Care and Durable; Our 3D air mesh technology material allows water and air to flow through the machine washable bathtub pillow; this bath neck pillow can be washed on cold water with a gentle detergent; never use bleach; the hot tub pillow comes with a hook hanger for easy hang-drying. Makes a Perfect Gift Idea; Provide your loved ones with some real relaxation; give the most comfortable bathtub accessory for all occasions such as birthdays, Mother's Day, Easter, housewarmings, or bridal shower parties and more.