Caused blisters when wet - Chaco OutCross Watersport Shoe - Kids

I ordered 2 pairs for my boys, different sizes and colors. They wore them off and on for 3 weeks, dry, then we went camping and they developed blisters on the bottom of their toes, the very same day they wore them to the pool and walked back to our site. We didn't even get the change to wear them hiking because it was too painful! I would think it was just a wrong size or something, but it did it the exact same spots to both of my boys. Chaco has not been helpful on getting me a credit or refund. I do not recommend these. This is the response from Chaco: "It looks like the blisters are caused from friction on the insole. When wet, the feet are likely sliding in the shoe and rubbing on the textured rubber footbed causing friction blisters."