Ethylene Vinyl Acetate copolymers(EVA) has the highest flexibility of all polyolefin liners and it is often preferred as replacement of PVC membranes. Various types of co-extruded EVA membranes are produced with Vinyl Acetate level between 9% and 18% (the higher the VA level the more elastic the membrane but the lower the softening point) as well as combinations of EVA with LDPE and VLDPE to take advantage of the useful properties of both materials.