Georgia Boot Carbo-Tec Farm and Ranch pull-on boots have leather that's superior to the others on the market. The upper is hard-wearing Spr leather, a great material for dirty jobs because it's ready to take on caustic chemicals and common barnyard acids that dry out lesser leathers. Spr leather also is very soft and is broken in right out of the box. Comfortable work boots are important when you work long hours. These 11-inch wellington boots have the patented Comfort Core insole. It cushions your foot and pushes air through the insole with every step. The fiberglass shank provides arch support. The Carbo-Tec outsole is highly flexible so you can move with ease. It also resists chemicals, slips and oil..