Viking Footwear Class 2 Chainsaw Caulked Boot 100% Rubber Shaft measures approximately Ankle millimeters from arch Heel measures approximately 1" Platform measures approximately 0.5" 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