OpenTex™ Non-Resorbable PTFE Membrane is a pure medical-grade polytetrafluoroethylene (PTFE) sheet. It is biologically inert and provides a predictable barrier. Due to its smooth surface and small pore size, OpenTex™ PTFE Membrane resists soft tissue and foreign substances into its structure and eases the removal of the membrane. Features & Benefits: 1. Stability Non-resorbable PTFE Membrane offers adequate healing time for the bone regenerative process 2. Biologically Inert PTFE is highly biocompatible and an ideal material for a barrier during bone regenerative procedures 3. Withstands exposure PTFE Membrane withstands exposure since it is impervious to foreign substances Non-Latex Shelf Life: average 42 months Country of Origin: South Korea