If you are looking for a flexible inner socket - look no further than DURAFLEX™.  Features & benefits include:  Can be blister formed with or without a frame or draped over a horizontal mold & seamed to bond back to itself & never come apart.  Plus the seam can be ground down flush with the socket so you can't even feel it and a light torch to the seam makes it almost impossible to see.  It bends with the patient, giving more comfort at the trim lines.  It has no silicone or latex in it to irritate any patients skin.  It's both crack and tear resistant with minimal shrinkage.  It won't turn yellow over time, is very hygenic (cleans with soap & water) and is non-toxic.  Another major advantage is that it won't expand due to lotions and creams that patients use on their residual limbs.  This will save money by not having to make another socket after the patient has worn it just a short time.  It has alot less skin traction than almost any other flexible plastic.  It will not lose memory after cooling and it's very flexible but at the same time extremely strong.  It comes in a variety of thicknesses: 1.5mm(1/16"), 3mm(1/8"), 5mm(3/16"), 6mm(1/4"), 9mm(3/8") and 12mm(1/2") and any sheet size large or small that you might need.