We have d out fly boxes in the most extreme conditions from Alaska to California and even in Florida. We pride ourselves in offering boxes that are willing to withstand all weather and water conditions, that's why we use environmentally friendly silicone to withstand the use of time. Our boxes will withhold against water and the casual dunking we all encounter from time to time. Our boxes are made from extremely durable impact resistant plastics and self-healing silicone to allow the maximum life out of your fly box. These boxes will hold everything from a very small size 24 flies up to about a size 8. We personally use our boxes as the perfect item when it comes to euro nymphing and dry fly aplications. We offer a 30 day no questions asked warranty on all orders!