Canvas

Cotton yarn in a tight plain weave makes canvas, the upper on most casual sneakers and espadrilles. Air moves freely through the weave, weight stays low, and the fabric takes dye in any color. Washability is its rare distinction among uppers: most canvas shoes tolerate a gentle hand wash or a cold machine cycle, which no leather and few synthetics survive.

Structure is not part of the deal. Canvas holds no shape of its own, gives no support, and offers rain nothing: an untreated weave wets through in minutes, then dries slowly while wicking water down toward your socks. Coated and waxed versions close the weave with a surface film, buying real water resistance at the cost of much of the breathability that made canvas appealing.

The fabric abrades honestly: expect wear at the toe flex and fraying around the eyelets after a year or two of steady use, and expect white canvas to record every scuff. Consolation comes in price and easy care: machine wash cold, air dry away from direct sun, and brighten whites with a baking soda paste rather than harsh bleach. Sun and repeated washing fade dyed canvas gradually, which plenty of wearers count as the look improving.

Canvas is woven from thick, plied cotton yarns in a plain over-under weave, the simplest structure a loom can make, with yarn weight and thread density supplying the toughness; the same construction once made tents and ship sails. Duck canvas, the common shoe grade, packs the weave tighter than artist's canvas for better abrasion resistance. For sneakers, cut canvas panels are stitched into an upper, attached to a rubber sole, and cured in a heated chamber so the rubber bonds permanently to the fabric, the vulcanizing process that defines classic sneaker construction. Blends add polyester for faster drying and less shrinkage. Waxed canvas takes one further step. Paraffin or a wax blend is worked into the finished cloth, filling the weave so water beads on the surface instead of soaking through.