"trudging uphill on a pair of hobnailed boots"
Hobnailed boots
GNU Free Documentation LicenseHobnailed boots - Credit: Anthony Appleyard

Hobnails are short nails with chunky heads.

Hobnailed boots have hobnails fitted onto their soles to give a grip on rocky ground or on snow. They sometimes also have a horseshoe-shaped piece of iron on the heel, and a metal toe-cap.

Click here to see another picture of hobnailed boots