A PopSocket is a plastic circle that is sticky-adhered to the back of a flat phone (or case). The PopSocket expands like a small accordion when you pull or "pop" it out two times. This enables you to place your fingers in between your phone and the end of the PopSocket for a more comfortable and protected hold.PopSockets are divided into 2 parts: the base (the sticky disc) and the PopTop (the design portion). While the PopTop section is basic to remove after you've had enough of it, removing the foundation is a little bit more difficult.