DOWN ALTERNATIVE DESIGN – 7.5 cm of ultra soft Microfiber fill offers the time-tested comfort of traditional down without any of the associated odors or sharp quills that usually accompany down; and with a thickness of 7.5 cm it is even more comfy than the usual 5 cm microfiber toppers MACHINE WASHABLE - A soft and breathable 250 thread count, 100% cotton percale cover envelopes the topper in a comfortable and durable package; Machine washable and dryer safe (on low) for easy cleanup and continued freshness LONG LASTING LOFT - Baffle box stitching helps maintain loft and improve breathability by keeping fill distribution in even uniform pockets and prevents fill from shifting or bunching in one area SECURE STRAPS - Thick SecureStrap elastic straps are positioned on each corner to securely attach the topper to the mattress, preventing the topper from shifting in the night and providing consistent comfort IMPROVED COMFORT - Periodically fluff by hand or place in the dryer on low to increase the amount of air trapped within the down alternative, improving the loft and comfort