Piquet fabric (or Piqué) is a cotton fabric weaved so as to have raised ribs, or cords of typically rhomboid design and generally white in colour.
It is a fabric made of two warp threads (one taught and the other slack) used for weaving two patterns (background and filling). The taught, background warp threads lower the weft threads as they pass through the weave creating a depression, while the slack threads remain on the surface in relief.
This creates a quilted effect which is enhanced by the soften filling thread. The result is an almost embossed fabric, soft and light, traditionally white or pale in colour.