The Octaspring True Evolution pillow is designed to offer 3 things above all else. Comfort, Support and a Cool feel at all times. The unique design of the Octaspring Spring allows for supremely comfortable support, something that other pillows rarely offer without compromise. The construction of this spring also allows for truly amazing breathability, which actively cools the pillow when in use. Supportive memory foam layer - Visco-elastic pressure relieving material that moulds to your unique body shape for blissful comfort. It remembers its shape, returning to its original form night after night. Breathable Octaspring® technology - Innovative memory foam springs proven to be eight times more breathable than traditional memory foam, move three dimensionally delivering supreme comfort and support. Back sleeper -  Designed for all back sleepers by properly supporting the head while keeping the spine aligned, preventing any undue pressure on your neck. 8 x more breathable - The unique ventilation of Octasprings is more breathable than pure memory foam, the constant airflow always keeps the mattress cool. Washable cover - Removable and washable for added convenience. The cover of this pillow is fully removable so you can unzip the cover completely and wash in a washing machine. Side sleeper - This pillow is great for those who sleep on their side, allows for better spine alignment to reduce pressure points by supporting your head. 50cmx70cm. Fits standard pillow case. 35 memory foam octaspring springs. 2 memory foam layers. 8x more breathable.