Porsche used squareweave carpet exclusively in their 356 models. With the introduction of the 911 in the late 1960s the factory continued with the use of this material for a short time. Perlon, a felt type of carpet, was offered along with squareweave in the early 911s. Squareweave had been phased out by the early 1970s and replaced by a wool wilton type of material known a Haargarn. Haargarn and Perlon were replaced in the mid 1970s by Sliverknit carpet which is still in use today. Most 924/944 and 928 models use a type of Feintuft Velour or Sliverknit carpet depending on the year.