The fabric has a plaid pattern in blue, black and white.
A plaid pattern is constructed with multiple horizontal and vertical stripes of various widths that intersect to create a checked pattern.
The fabric appears to be a plain weave.
Plain weave is the most common type of weave, where one horizontal thread (weft) passes over one vertical thread (warp), then under the next two, and so on. This creates a strong, balanced fabric that is suitable for a wide variety of uses.