Leather is produced from animal hides, most commonly cattle, as a byproduct of the food industry. It has been used for thousands of years across cultures for protection, utility, and craft. Leather is biodegradable in its natural state, but its environmental impact depends largely on tanning processes and chemical use. Responsible leather focuses on reduced-impact tanning, improved waste management, and transparency in sourcing. Leather is widely used in footwear, bags, belts, furniture, and accessories, valued for its strength, repairability, and ability to age gracefully.