I just want to share my experience with Mongrel Boots.
I purchased a pair of zip siders and at first was very happy.
Then I found that the thread that attached the zipper teeth to the zips backing cloth was abraded by the action of the zipper and then the teeth come away from the zips backing material. I could easily pass a pen between the teeth and the zip backing.
I went back to the Boot Warehouse and they did not want to know me. I took it up with the wholesaler, Victor Footwear. They did not warrant it but did offer to replace the boots at wholesale price of $80.00 because I had used the boots over the 12 month warranty period.
Eight months into the second pair and the same thing is happening. I wrote Phillip Cloros at Victor Footwear again but they now say its damaged by external abrasion to the outside of the zip by looking at a photo I sent them.
The thread that secures the teeth to the backing is completely hidden by the teeth for its full length. So thats a load of crap. They also said that if I had an issue with the zip then I should take it up with YKK themselves. The greasy low life logic that drives some people when they just cant accept that less than a year in ordinary service, is not a warranty situation, when they claim they warrant their products against faulty materials and workmanship.
Be that as it may I cannot recommend Mongrel boots as a product and more importantly because you have no warranty, and you are forced to deal with people lacking integrity.