What material is considered the best protection for workers when welding?

Leather is considered the best protection for workers when welding due to its superior durability and resistance to heat and sparks. It effectively shields against molten metal and protects the skin from the intense heat generated during the welding process. Leather garments can withstand the rigors of welding activities without easily catching fire or melting, which is crucial for the safety of the welder.

While nylon and polyester can be lightweight and comfortable, they are not suitable for welding due to their tendency to melt when exposed to high temperatures, posing serious burn risks. Cotton, although breathable, offers less protection against sparks and slag compared to leather. Therefore, leather's robust properties make it the preferred choice for protective clothing in welding situations.