Does the DefenderPad® Pillow block EMF radiation? B Does the DefenderPad® Pillow block EMF radiation? No, the DefenderPad® Pillow itself does not have any EMF radiation shielding capability. It is an accessory designed to be used with the DefenderPad® Laptop Radiation & Heat Shield, which blocks up to 99% of harmful EMF and heat emissions. Permalink rduran How can I protect myself while on a cell phone call when my device is inside the DefenderShield® EMF Protection Pouch? How Do Electronic Devices Produce Electromagnetic Radiation (EMFs)?