Drill is stout, durable cotton fabric with a strong bias (diagonal) in the weave. It can be used unbleached, although it is more often bleached or dyed. The heavier weights were often used in corsets, and are commonly used in work clothing and uniforms.
Other uses
Drill is a versatile fabric that has been used in a variety of applications. Boat sail drill is a lightweight, unbleached drill used to make sails for sailing craft. Although duck (canvas) was more commonly used for these purposes, drill has also been used to make tarpaulins, tents, awnings and canopies, but the use of both fabrics has been supplanted in modern times with synthetic fabrics. Like duck, drill is used as a covering for furniture and cushions.