Schematic of some common components of a dress shoe including the insole, stiffener, shank, outsole, toe puff, and welt.

In a boot or shoe, the shank is a long, thin piece of material between the insole and outsole intended to support the foot and provide structure.

Background

Materials and design for shanks vary widely with the purpose of the footwear. The shank of a pointe shoe used for ballet is made of flexible materials like leather, plastic, or cardstock, and may have customized length, thickness, and stiffness. Heavy boots such as those used for construction or hiking have far more rigid and durable shanks, often using steel, though contemporary shanks are more commonly made of less heat-conductive materials such as fiberglass and Kevlar. These materials' rigid nature adds a protective element, helping shield feet from puncture wounds and stone bruises.[1] The shank is crucial to the functionality of mountaineering boots, as they diminish the load incurred by the feet and calves over the course of an ascent.

References

  1. ↑ "PROTECTIVE FOOTWEAR FAQS". Tyndale. Retrieved 16 December 2019.
  1. What is a steel toe shank in a work boots?
  2. Steel shank versus nylon shank (Differences and purposes)
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