Baby Shoes Manufacturer Is There "toxic Leather"?

Is there "toxic leather"? - baby shoes manufacturer

I make my own soft-sole children's shoes, handbags and collects coats from the old economy and donations. The manufacturers of baby shoes boast that it "non-toxic baby skin safe." I have for this incredible material, and they do not find everywhere. My question is I was there ... nothing like the "leather-toxic" or is it just a marketing ploy? I like to think I bring my children in danger. Thank you!