Viking Footwear Journeyman Waterproof Boot 100% Rubber Shaft measures approximately Ankle millimeters from arch SBR blended NR upper with cotton canvas lining. Highly chemical resistant rubber upper Abrasion-, oil-, chemical-, heat-, and slip-resistant, SBR blended NR outsole Ultra flexible: Exceeds 305,000 Flex Rating Compatible with ice studs Ideal for Construction workers, Utility & maintenance workers, General labourers, Field engineers, Electricians