In looking up Horween Leather (wondering what a Horween was and why it made good leather) I saw many references to Chrome Tanned Leather as a major product of the company.
Any veg-tanned leather works well and I see the company also makes that, but Chrome tanning is generally considered to be a bad thing for lasers and living things. There is some controversy (more than say PVC that is a severe no-no)but no question that the fumes are a bad thing to breathe. and something that deserves knowledge and attention.
The labels look great and welcome to the group. You will find tons of information here from an amazing informed group of folks.