What fabric is the toughest depends on what the fabric needs to be "tough" against. If it needs to be a garment that needs to be tough against wear, then yes, heavy weight demin would be the answer. If it needs to be tough against stretching, then a vinyl coated nylon would be best. If it needs to be tough against being cut, then Kevlar is the toughest.
While many people believe denim is very tough, the toughest fabric you can buy is canvas.
Tweed seems to be one of the most durable.
Leather sofas are the most comfortable and durable.
Most baby bedding is made of cloth fabric.
Poly Cotton is the best durable mix, 65% Polyester 35% Cotton, (Polycotton) standard everyday fabric
Cotton tee's clean the easiest, and jeans are most durable.
A durable synthetic fabric.
denim
A fabric glue that is specifically designed for bonding fabrics, such as a fabric adhesive or fabric glue stick, is the best option for creating a strong and durable bond between fabric materials.
A fabric made of polyester or acrylic is best suited for a durable and weather-resistant canopy.
Leather is usually the most durable, but if you get cheap leather and/or don't care for it properly, it won't last. High-quality fabric cared for properly would last better than poorly maintained, cheap leather.
Leather is more durable as long as it is quality leather.
Renu leather fabric is a composite of polyurethane, leather, and polyester. It is a breathable and durable fabric that is comfortable to sit on.