Dunlop Purofort: My favorite boot for working in nasty conditions. Good for mucking through manure, drilling rig worming, ditch digging, and frac water hauling. They take a licking, and keep on kicking! :
Purofort FieldPRO Soft Toe, Green | 15'' Waterproof PU Boots
Dunlop - Purofort Thermo 662843 Men's 14" rubber work boots