In this article, I use radiation-shielding maternity clothes as a window to explore motherhood and reproductive uncertainty in urban China. By engaging with literature on scientific uncertainty and intensive mothering, I argue that the scientific uncertainty over the possible negative impact of electromagnetic radiation on pregnancy has led to a situation in which uncertainty is being socially reproduced by experts, markets, and policy makers through different media channels. Middle-class mothers do not fully believe that the cloak is scientifically trustworthy. But (...) under the influence of social networks and the ambient awareness of the reproductive crisis related to environmental pollution and the pressures of modern life, middle-class mothers still choose to wear the clothes for a variable period of pregnancy for psychological feelings of safety. In the end, they choose to cloak their pregnancies but immediately claim their suspicions of the cloak. (shrink)