sharkskin
suiting fabric, often of worsted, woven with two colors in both warp and weft, giving a salt-and-pepper effect
en-GB/ˈʃɑːkskɪn/
en-US/ˈʃɑɹkˌskɪn/
suiting fabric, often of worsted, woven with two colors in both warp and weft, giving a salt-and-pepper effect