These are very comfortable boots. You will not know you are wearing safety shoes. Zipper is heavy duty. I have found with other big name zip boots that this is the first thing to go. Now the bad. When I opened the box I was overwhelmed by the glue smell. I aired them out for 2 weeks and the smell was just as strong. 2 months later I still can slightly smell it. Provided theseage well I will purchase this brand again..Below quality- sadly, one of the boots in the pair we received, the zipper does NOT function.Work in the field. This. boot is too uncomfortableBuena calidad y lucen perfectas. Se quedan cortas en comodidad, a pesar de tener apariencia de botas de alta línea, se quedan debajo de una bota cómoda como de marcas de botas de trabajo ya reconocidas. No se puede pedir mucho por el precio que tienen. Valen la pena.Excelente calidad y diseñollego a tiempoBastante cómodas