The SOLID 4 inch MEMORY FOAM in our orthopedic dog bed provides an ultra premium base for superior overall comfort, reduced joint pain (arthritis) and improved health, mobility, & energy. (ii) Comforts as a Calming dog bed for dogs who suffer from anxiety. (iii) Recycled 'green' support bolsters are generously filled. (iv) Durable & comfortable polyester (65%) & cotton (35%) twil.