Boot one month old. First rainy day, 3 hours working out in the rain but not walking in deep puddles and my socks became wet on the outer seam area of both boots. See photo with circle. I could feel it. I'm very surprised. My old cat boots were 3 years old before they did this same area of leaking. But it was a different style Cat boot that I can't find anymore. I guess I will try and buy seam sealer because other than that.. the boots were comfortable right out of the box... true to size. Perfect fit for my foot. But I do work outside .. raining or not. Maybe I'll try again to find my older boot style.