Introducing Simba’s most innovative pillow to date! Expertly designed with five layers, the Simba Hybrid Pillow provides you with a perfect amount of comfort and support. Simba has created their own astronaut-inspired temperature regulating cover - Stratos®! It has phase-changing technology applied to the soft cotton cover to absorb, store, and release heat whenever you need it. With this technology, you stay at your ideal body temperature. Presenting Nanocube® technology, each Simba pillow comes with hundreds of small cubes which then can be removed to tailor the depth and firmness of your choice.