This dual-layer pillow is engineered to stay supportive, cool, and comfortable throughout the night — regardless of your sleeping movements. Sleep on it, lounge on it, dream on it – the possibilities are endless. To get the right balance of squish and support, the team at Casper invented a unique pillow-in-pillow design that’s perfect for all sleepers. The inner pillow is supportive, while the outer pillow adds a soft touch of fluff. The percale weave keeps filling fibers from escaping and maintains breathability. Their cutting-edge, low-friction fibers (each thinner than a human hair!) create a plush, cushioning outer surface. A 2” gusset distributes fill for a consistent loft across the entire pillow and provides neck support and better spine alignment. Nearly a billion shorter fibers adapt to your movements and create their pillow’s signature springy support.