"DOWN ALTERNATIVE DESIGN - The ultra-soft 3"" microfiber filling provides the proven comfort of traditional down without any smell and without the stiff pinnas that usually go with it. The 3 inch height makes it even softer than a regular 2 inch mattress topper MACHINE WASHABLE - A soft, breathable 250 thread count fabric, 100% cotton percale, wraps this topper in a comfortable and durable way. Machine washable and dryer safe (on a gentle program) for easy cleaning and continuous freshness LONG LASTING VOLUME - stop seams help maintain the filling and improve breathability by keeping the filling in even pockets, preventing it from gathering in one place FIXING STRAPS - SecureStrap thick elastic straps are positioned at each corner to attach the topper to the mattress, preventing the topper from shifting during the night and bringing you constant comfort IMPROVED COMFORT - Periodically shake the pillow or place it in the dryer on a gentle program to increase the volume of air in the fibres, which improves the comfort provided by the filling"