Men's Georgia Boot Farm and Ranch Wellington Work Boots This boot is made with SPR leather. Compared to traditional leather, it is roughly 3 times as strong and resists abrasions 2.5 times as well. SPR leather also holds up better than conventional leather against common barnyard and job-site chemicals or acids. The sole of the men's work boot is a direct-attached, dual-density, oil-resistant polyurethane "Suspension Wedge" outsole. It resists chemicals, abrasions and oils, while remaining flexible and providing cushion for your feet. This boot also has a steel shank which provides support and protect the arches of your feet. A patented Comfort Core insole adds shock absorption.