What type of radiation does this protect me from? What frequencies does it block?

WaveStopper™  features a full layer of SilverFlex™  fibers. Silver provides the conductivity necessary for WaveStopper™  to be an effective electromagnetic shield. In addition, it brings natural antimicrobial, "stink-free", heat regulating, and hypoallergenic properties to all of Lambs' apparel. SilverFlex™ fibers are toxic-free, do not use any nano-particles, and cannot be scratched off or washed out.