that modern leather manufacturing is highly transparent, given that more and more tanneries nowadays comply with different audit standards, including The Leather Working Group’s (LWG) environmental protocols? The Leather Working Group is a non-profit organization and has more than 1,000 members from across the supply chain representing retailers, brands, leather manufacturers, chemical suppliers and other associations within and related to the leather industry

* Source: https://www.leatherworkinggroup.com/who-we-are/about-us
  https://www.timberland.com/blog/style/leather-goods-the-favorites.html
* Remark: Audited leather manufacturers get audited by LWG and based on the score can obtain various levels of compliance, the highest standard being GOLD. Fashion brands such as Timberland only source leather from LWG silver or gold-rated tanneries.