PREMIUM MATERIAL&SOFT FILLING Tightly woven and thin brushed microfiber fabric is exceptionally soft, breathable and comfortable. It's also durable, no risk being ripped even with frequently washing. Compared with traditional mattress topper, it's double filled with 3D snow down alternative filling, enough soft, plush and warm. Materials are clean, helps diminish the negative outcomes of a person who has sensitive skin. ULTRA THICK&MAXI COMFORT With overfilled down alternative filling, ELEMUSE mattress topper is extra thick and supportive, offering pressure-relief properties that provide greater support for your hips, shoulders, back, and knees. Down alternative filling retains less body heat than memory foam, causing less uncomfortably warm or hot during the night.