Polyester DESIGNED FOR HALO BASSINEST – Made to fit the unique hourglass shape of the BassiNest, this replacement pad provides a snug and secure fit for safe sleep. WATER-RESISTANT COVER – Features a polyester outer layer that is surface-wipeable to help protect against leaks, messes, and odors. CLEAN SLEEP SURFACE – A must-have for messes, this replacement pad ensures your baby always has a fresh, hygienic place to rest. EASY TO MAINTAIN – Simply wipe clean with a mild solution and allow to fully dry before use or replacing in the BassiNest. PERFECT BACKUP OR REPLACEMENT – Ideal for replacing your original pad or keeping an extra on hand for quick changes. Use with a HALO BassiNest fitted sheets and waterproof cover.