To regular people, "canvassing" means going door-to-door asking strangers for donations to your cause. For suiting geeks, it refers to the layer of horsehair that allows a suit jacket to mold to your torso over time. Done by hand, it's a painstaking detail that sets a great suit miles apart from its factory made, fused counterparts. Fused suits are essentially glued together, and don't hold up as well over multiple wears. Plus, aficionados tend to care more about fabrics and details like Loro Piana wool and functional button cuffs.
How a Suit Is Made