Carolina Men's Subframe 6" Waterproof Side Zipper Composite Toe Work Boot -Brown- CA5550 FeatureVibram Sole and the air mesh lining

and the air mesh lining lets your feet breathe whether you're out on the farm or trudging across frozen fields

Its thinner toecap wall leaves more room in the toe box

How durable is the upper

No — it's built 100% non-metallic

Cement-Constructed Rugged Flex® Rubber Outsole for durable traction and flexibility

Carolina Men's Subframe 6" Waterproof Side Zipper Composite Toe Work Boot -Brown- CA5550 FeatureVibram Sole and the air mesh liningThis excellent all around boot combines a durable yet lightweight construction with a zipper for added convenience. The Subframe CA5550 is a 6" waterproof composite toe work boot with a side zipper for easy on and off, a composite safety toe, and Carolina's waterproof SCUBALINER. Key Features of the Carolina CA5550 Composite Safety Toe Non metallic toe meeting ASTM F2413 I C, with reduced cold transfer. Side Zipper Easy on and off without re lacing.