This is what my new Chota’s STL boot looks like after a dozen days on the water. I contacted Chota about it and was told they are not covered under their warranty service because they are an older model even though I purchased them less than a year ago. I don’t have the receipt and cannot prove when they were purchased. I bought them because the first pair I purchased lasted over 250 days of use and abuse. The retailer I purchased had them on sale, I guess because they would not be covered under warranty. I will not buy another item from Chota because of their customer service on this matter. It is quite clear that this is a manufacturing defect and should be a no hassle problem for me as the consumer.