I bought these because of the good reviews but am very disappointed- these are NOT waterproof!! If I could give zero stars, I would.  My 3.5 likes to splash in big puddles and even with snowpants or rainsuit pants placed over the legs of the boots, they quickly become soaked. Almost as if the water penetrates or is absorbed by the fabric/plastic material on the legs. What's even worse is that they smell awful now because of the moisture- you can take out the sole pad and dry it but the lining of the boots and material on the sides don't dry well even when placed in front of a hot furnace. I can't figure out who to contact but we are outside of the return window anyway. Wish I could get my money back!! Save yourself the hassle and buy truly waterproof rubber rain boots!!