The Alerta Sensaflex 250 is a high risk memory foam cushion which provides effective comfort, care and pressure redistribution for users in hospital, nursing and care home environments. To launder the cover in a washing machine, set the main wash to 65oC for no less than 10 minutes or 95 C for no less than 3 minutes. The cover can be tumble dried on low heat and the temperature must not exceed 60oC. The foam can be autoclaved at 134 C. 17x17x4"