Cytoflex Tefguard is a non-resorbable membrane made of micro pourous expanded PTFE (ePTFE). The micro porosity of Cytoflex Tefguard is designed to allow the diffusion of body fluids, while preventing the penetration of fibroblasts and bacteria across the membrane. The flexible membrane easily conforms to the tissue contours and can be retrieved with ease after the completion of bone regeneration. Each box of Cytoflex Tefguard contains 5 sterile, individually packed membranes. Expires in 2016.