Our Flame Retardant (FR) Fitted Sheet is made by 145gsm 100% Inherently Flame Retardant Plain Weave Polyester. Its Flame Retardancy won’t be affected by multiple washes. The fabric is compliant with BS Standard 7175 Ignition Source 5 and 7. Our standard size is: Double size 4'6"x6'3" With improvement in dyeing and finishing processes, the material is softer than normal stiff polyester fabrics to give customers a feel of cotton blend. Our flame retardant bedding is a perfect combination of high quality and low price. All the bed linens are densely and beautifully hemmed to ensure a long lifespan for multiple uses. How to care: Machine washable at 60 degrees. Medium tumble dry.