Wear under or over clothes throughout your pregnancy, with larger side fully covering your belly. * Efficacy: Shields 99.9% of incoming radiation (~50dB). * The Belly Band is for expecting mothers who prefer less snugness around their belly and a looser fit. * The pleated design makes it easy to adjust coverage vertically and discreetly cover unzipped pants as your belly grows * Size: 1 fits Pre-pregnancy size 0-4 US, Size 2 fits Pre-pregnancy size 6-10 US, Size 3 fits Pre-pregnancy size 12-18 US.