Foam Material: our foam chair cushions for Christmas are made of foam material, ensuring prolonged extended use; This material is naturally provides a comfortable seating experience, enhancing your overall comfort; Tips: the product is compressed for transportation; After receiving the product, please unpack it and wait for half an hour for the product to rebound to its normal size Pain Relief: providing the support your body needs, these Christmas foam seat pad can help relieve discomfort; They ensure your body gets the support it needs, particularly for those who spend long hours sitting Generous Size: measuring approximately about 18 x 16 x 4 inches/ 45.7 x 40.6 x 10.2 cm in length and width and height respectively, these foam cushions are generously sized; They fit most chairs perfectly, providing an ample cushioning surface for optimal comfort Breathable Ventilation: despite their thickness and plush feel, these foam seat cushion offer great breathability; They help regulate body temperature, preventing overheating for an always cool sitting experience Ultimate Comfort and Softness: designed with your comfort in mind, these foam cushions for chairs are incredibly soft; They surround your body with support, enhancing your relaxation experience, while providing relief from back and seat pain.Tips: The sponge material is not easy to clean. In order to keep it clean and use it for a long time, you can use it with a cushion head, or cover it with a pillowcase or separate it.