Evolution Liners Evolution Liners offers a full range of liner options, from Custom Silk Liners, Origin off the shelf liners available in standard sizes, and Chameleon liners, a selection of liners sized and colored especially for kids. All Evolution Liners are available in pin and cushion configurations. All pin liners include a full matrix, and matrix is available for select cushion liners. E-Tendons are also available for BK custom liners only. Features of all Evolution Liners include: Manufactured with a unique medical grade silicone formula developed specifically for the Orthopedic industry. Doesn???t reduce in thickness or change shape over time. Superior tensile and tear strength A silky surface that allows the liner to slide on itself No coatings that crack, peel, or wear off N