Polyester, Tencel Zippered Encasement: The side zippered ensures a secure fit for all-around protection. This user-friendly design allows for hassle-free installation and removal, ensuring you can easily maintain a clean and fresh sleeping environment. Antimicrobial Product Protection: Treated with antimicrobial product protection to inhibit the growth of odor-causing bacteria, offering you a peace of mind and while protecting the product itself and not the user. Waterproof Protection: Soft, quiet top fabric is backed by a durable waterproof layer, protecting your mattress from unexpected spills and stains. Temperature Regulating: Stay cool in the summer and cozy in the winter with our temperature-regulating technology. The Tencel blend fabric naturally wicks moisture away from your body, promoting a balanced and comfortable sleep year-round. Certified and Sustainable: OEKO-TEX Standard 100 Certified. This product meets rigorous testing standards to ensure it is suitable for your family and the environment.