CSA approved 100% Rubber Rubber sole Shaft measures approximately 14" from arch 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 SAFETY RATING: CSA Z195-14 ‘Green Fir Tree’ chainsaw protection - Chainsaw Cut Protection Class 3 (28m/sec chainsaw speed as per EN ISO 17249:2013) CSA Z195-14 / ASTM F2413-11 Grade 1 steel toe and plate