Viking Footwear Bushwhacker Waterproof Steel Toe Winter Boot 100% Rubber Importado Heel measures approximately 1.25" Made of SBR blended NR for maximum chemical protection. High impact, abrasion-, chemical-, and oil-resistant NBR lug sole. Highly chemical resistant rubber upper Removable foam liner provides warmth for up to -70C/-100F Air-cushioned heel with achilles tendon, ankle, and metatarsal protection Compatible with ice studs. Ultra flexible: Exceeds 305,000 Flex Rating Ideal for Construction, Professional arborist, Harvesters, Log quality inspectors, Forestry conservation workers