Clima Max Pillow Mattress Consists of Outlast Wellington Fabric on One Side and 100% Cotton Covered Fabric on the Other Side. It has a zipper. It can be washed as often as desired. It provides a "climate balancing" feature to every type of pillow in your home, promising you a comfortable sleep without feeling cold or sweating. Its size is 50*70 cm. Sold as 1 piece in a box. Clima Max consists of Othello s products that contain value-added special technology/workmanship and focus on providing a comfortable sleep with proactive temperature control. It has 4 different products consisting of pillows, duvets, bed pads and pillow pads. You can sleep deeply and healthily in the ideal climate with the "Clima Sleep Triangle" consisting of Clima Max Pillow, Duvet and Mattress Mattress in your Bedroom. Special Thermo Encapsulated PCM (Phase Change Materials) Wellington Fabric Produced with Outlast Technology Developed for NASA was used in its coating. Outlast® Technology Used in Wellington Fabric is a Proactive Technology that Adapts and Changes According to Your Personal Situation. When it gets hot, the thermo capsules in the fabric absorb the heat and cool the environment. When the environment cools down, this heat is released. Outlast® Technology Proactively Balances Your Temperature by Managing Heat to Reduce Overheating and Sweating.Washing Instruction: Can be washed at 30°C. Bleach Should Not Be Used. It is not ironed.