A cotton dobby pant is a type of garment made from cotton fabric with a dobby weave.A weaving technique that creates a textured pattern in the fabric, often adding a subtle geometric design or texture.otton dobby pants are often lightweight and can be quite stylish, offering both comfort and a bit of visual interest due to the texture of the dobby weave. They can be a great choice for casual or smart-casual wear, depending on the design and fit.