Matt and Nat is a vegan brand. No animal products used in production. The linings inside all MATT & NAT bags are made out of 100% recycled plastic bottles. In addition to being vegan, sustainable materials are constantly sourced in design such as cork and rubber. Various vegan leathers are used in production, the scientific terms are PU (polyurethane) and PVC (polyvinylchloride). PU is less harmful for the environment than PVC and they make it a point to use it whenever possible. We continuously try to improve the standards for all our materials. The factories operate by the SA8000 standard. Each factory is visited diligently where strong personal relationships with their owners are built.