the.com/steel toe

means A reinforced boot with a protective cap (originally steel, now often composite) built into the toe to shield your foot from heavy falling objects or crushing weight.

from Straightforward compound of 'steel' and 'toe,' describing exactly what it is — a steel cap inserted into work footwear. The design grew out of industrial and military safety needs in the early-to-mid 20th century, as factories, construction sites, and docks demanded standardized protective gear; safety codes eventually required 'steel-toed' boots by name, cementing the term. Modern versions often swap the steel for aluminum or composite plastic, but the name stuck around long after the actual steel started disappearing.