It is important you regularly clean your cushions. Even if you cannot see stains, dirt, sweat and build up of pollution will not be enjoyable to sit on. We use 100% solution dyed acrylic on all our designs. We source these from USA, France and Spain using Sunbrella, Dickson, Glen Raven and Agora. To make life easy and unlike any other brand, Osier Belle excels design to every detail, making all the cushion covers with wrap around, hidden YKK zip system for easy removal. SImply take off and put in the washing machine (for more details https://global.sunbrella.com/en-us/how-to-clean). After machine washing, we recommend you spray with Fabric Guard 303 (available to purchase from Osier Belle), this resists stains, soling and build up of mildew by restoring the water repellency. If something has soaked through to the fabric into the foam, place in sunshine and hose until clean and leave to fully dry.