Viking Footwear Class 2 Chainsaw Boot 100% Rubber Shaft measures approximately Ankle millimeters from arch Heel measures approximately 1.25" SBR blended NR upper with cotton canvas lining Highly chemical resistant rubber upper. Abrasion-, oil-, chemical-, and slip-resistant NBR lug sole. Achilles tendon, and ankle protection. Air-cushioned heel Rubber lace collar with safety reflective stripe. Ultra flexible: Exceeds 305,000 Flex Rating Ideal for Professional arborist, Harvesters, Log quality inspectors, Speeder and planters, Plant maintenance managers