The DefenderShield® Laptop EMF Radiation Protection Sleeve use use multiple layers of advanced shielding technology to block up to 99% of Electromagnetic Field (EMF) radiation from the bottom your laptop. The DefenderShield® Laptop Sleeve is also a lightweight, durable carrying case that can protect your device while on the go. This laptop case uses DefenderShield’s military grade, state-of-the-art Ultra Armor+® Shielding Technology to help protect your body from all EMF frequencies up to 90 GHz emitting from the bottom of your laptop or tablet. Just place your DefenderShield Laptop Radiation Sleeve under your laptop to protect your lap from EMF and 5th Generation radiation emitting from the bottom of your device. It should not affect cellular service or connectivity. For a non-slip heat-blocking laptop shield, check out our DefenderPad Laptop Shield! Perfect For: travel, e-learning, school, work, entertainment, on-the-go. All Features: