Concerned about Cell Phone radiation affecting your health?
One pocket is totally enclosed by a tightly woven metallic fabric which totally blocks all RF radiation; i.e. no phone signal, no GPS, no WiFi and even no Blue Tooth. The metallic pocket uses what's known as Faraday Shield Technology.
The second pocket has the shield only on the back of the phone, so you're phone can still ring and the GPS will operate. But the radiation hitting your body from the phone will be greatly reduced