1. SOFT MATERIAL: Large dog bed made of quality polyester/polyester fabric. The 4 colors with specifications A, B, C, and D are polyester fabrics, while specifications E and F are polyester fabrics. No matter which fabric is used, it is machine washable. 2. NONSLIP MACHINE WASHABLE: Washable dog bed with a nonslip design on the bottom prevents easy slipping. Machine washable and ready to use after drying. 3. SAFETY COMFORT: The included boneshaped pillow can be moved as desired, providing support for the neck and head and creating a sense of security. Give your dog a better rest. No deformation or collapse. The soft pearl cotton filling relieves joint and muscle pain. 4. 4 SIZE OPTIONS: There are 4 sizes of dog beds to choose from. S (25.6 * 27.7 * 3.9 inches) is suitable for puppies weighing 7 kg; M (33.5 * 21.7 * 3.9 inches) is suitable for dogs under 14 kg; L (39.4 * 26.8 * 3.9 inches) is suitable for dogs up to 24 kg; XL (47.2 * 35.4 * 3.9 inches) is suitable for large dogs under 50 kg. Please choose the size that fits your dog.