Our eco-friendly leather collars and leads are vegetable dyed skins that use no toxic chemicals. This is a traditional, lengthy process in our Tuscan tannery that is an environmentally friendly dyeing process, used for centuries by artisan master tanners and handed down from generation to generation. Only natural tannins from trees and plants are used to dye the leather. Our leather is metal free, does not contain any toxic substances such as azo-dyes, nickel, PCP, or chrome VI which are not only harmful to humans but also to the environment. No animal is killed for its skin, the raw hides used in the Tuscan tannery are the discarded by products of the food industry. The raw hides are from the slaughter of cattle destined from the outset to the food sector and they come from European farms which comply with EU legislation on animal welfare.