“Leno Mesh is made with a twist in the warp yarn to create a mesh that is extremely durable and flexible. It is an excellent choice for applications where air or water must pass through, but high strength is required. Examples are mesh panels on pack frames, wand and ski pockets on climbing packs, vent panels on dive bags, and to cover foam on the shoulder and waist straps of backpacks. It is a versatile all-around stiffener as well.”
Via therainshed.com