The only suitable material for gloves on this list is?

Leather is the only suitable material for motorcycle gloves among the listed options because of its durability, abrasion resistance, and ability to provide protection in the event of a fall. Leather gloves are designed to withstand the elements and the wear and tear that comes with riding a motorcycle, offering better grip and control over the handlebars.

Nylon, while often used in riding gear, does not provide the same level of protection as leather. It can tear more easily and may not offer adequate abrasion resistance in a crash. Canvas, although breathable and comfortable, lacks the protective qualities necessary for motorcycle riding and is not typically used for gloves due to its vulnerability to tearing. Rubber gloves are generally not designed for motorcycling purposes; they may provide grip and water resistance but lack necessary protection against abrasions and impacts.

Thus, leather stands out as the optimal choice for gloves, ensuring riders have the necessary protection while maintaining comfort and maneuverability.