A flexible and protective support stay is disclosed. The support stay has insert tabs with rounded edges at both ends to reduce snags when inserting the stay into a garment. The flexibility of the stay is provided by a sinuous member that is independently flexible in two directions. This design enables the stay to flex and move with the wearer of the garment. Because the stay is made as an integrally formed plastic article, the probability that the device will shear and expose the wearer to sharp edges is significantly reduced.