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Sturdy, medium to heavy cotton fabric with a tightly woven twill weave. Drill is often a 3/1 left-hand twill and it can also can be 2/1, or right-hand twill. It may be found in a herringbone pattern of alternating twill directions. The fabric can be unbleached, bleached, dyed or printed (such as in ticking stripes). The name comes from the Latin trilex, meaning three threads.

Uses: Work wear, uniforms, sportswear, pocket and shoe linings

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