FLAME RETARDANT & WATERPROOF (PU) DUVETS  Product Details:  Premium Polyurethane Coated Outer Cover 100% Polyester FR treated Hollowfibre Filling Anti-Allergenic Highly Durable Soft feel, Low Noise  Wipe Clean only  Our flame retardant, PU duvets are manufactured in UK using FR Polyurethane synthetic fabric, which is tested to ensure it complies with British Standard (BS) 7175 1989 Section 3.Polyurethane is a polymer composed of organic units joined by carbamate links. While most polyurethanes are thermosetting polymers that do not melt when heated,  Our duvets and other FR bedding products, be it cotton or polyester, gain their flame-retardant properties through a quality controlled Chemical process. This process means that our products are treated with a chemical that allows the fabric to form an insulating char when exposed to flames, thus protecting the fabric and providing a completely reliable flame-retardant performance.    Our FR & Waterproof  PU duvets are filled with 100% pol