Houndstooth 

Houndstooth is a duo tone textile pattern characterized by broken checks or abstract four-pointed shapes, often in black and white, although other colours are used. The classic houndstooth pattern is an example of a tessellation.

Houndstooth checks originated in woven wool cloth of the Scottish Lowlands, but are now used in many other materials.
Houndstooth is pretty simple when you get down to the mechanics of things. Many different versions exist, but the most basic is created by weaving alternating groups of four black and four white threads together in a simple 2×2 twill pattern. That signature broken appearance comes from advancing the weave by one thread each row or column, so that edges of each check are staggered.

And though the Scots preferred a version that was woven only from black and white woolen yarns, things have shifted since the birth of the pattern. Now, you can find it in pretty much every sort of material, and color choices abound.
A few hundred years ago, you wore houndstooth to avoid a fight.