Synthetic duvets are typically made using lightweight hollowfibre or microfibre polyester, offering soft and silky comfort all night long. Benefits of synthetic duvets include: Hypoallergenic properties: Synthetic fibres are hypoallergenic, which makes them suitable for anyone who suffers from sensitivity to mites and dust. Affordable: Synthetic materials are generally more affordably priced than luxurious natural alternatives, like silk and bamboo. . Easy care: Hollowfibre and microfibre fabrics can be machine washed frequently and are straightforward to look after.