Crocsサンダル クラシック クロッグ キッズ/トドラー (定番)

Bought these 8/29/20. Only worn for dog walks. Dolls are worn out with a hole in the right clog. How long should these last?

Do these have a cushy inner sole? I need some soft water resistant shoes?

What is the shipping weight as I guess it is wrongly listed 6 pounds

What size is equivalent to J2?