Hobnailed boots (in Scotland "tackety boots") are boots with hobnails (nails inserted into the soles of the boots), usually installed in a regular pattern, over the sole. They usually have an iron horseshoe-shaped insert, called a heel iron, to strengthen the heel, and an iron toe-piece. They may also have steel toecaps. The hobnails project below the sole and provide traction on soft or rocky ground and snow, but they tend to slide on smooth hard surfaces.
- Tearing at the backstay: solved by securing the backstay with 3 rows of stitching each side.
- Letting water in: solved by dubbin.
- Rotting in foul conditions in trenches: solved by chrome tanning rather than using vegetable tanning.
- Cold conducting through hobnails into the feet: that, and need for strength, solved by three thicknesses of leather in the soles.
- Sole wear: toe and heel irons in addition to hobnails.
Hobnailed boots were formerly used for mountaineering to grip on sloping rock surfaces. Mountaineering hobnailed boots tended to have large pointed hobnails on the extreme edges of the soles and heels to grip small roughness on steeply sloping rock and on snow, particularly before crampons were used.
- Hobnail: Chambers's etymological dictionary of the English language: 
- Stud: Chambers's etymological dictionary of the English language: 
- Caulk boots (spike-soled boots worn by loggers and tree planters in many places)
- "Little Tanks - The American Field Shoe [Boot]". Worldwar1.com. 1918-11-11. Retrieved 2009-09-06.
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