Sharkskin
Sharkskin, or grisaille (from French gris, meaning grey) describes a specific woven or warp-knitted fabric with a distinctive sheen. Sharkskin is a twill weave fabric created using acetate, rayon, worsted wool, lycra, and other plastic fibers.
The arrangement of darker and brighter threads in a twill weave creates a subtle pattern of lines that run across the fabric diagonally and a two tone, lustrous appearance. Primarily a suiting material, the fabric is sometimes seen in light jackets and non-fashion items such as curtains, tablecloths, and as a liner in diving suits and wetsuits.