Lucy & Yak uses GOTS and OCS-certified organic cotton, GRS-certified recycled polyester, Lenzing™ Ecovero™ viscose, deadstock fabrics, linen, bamboo, and hemp. All materials are biodegradable or recycled, third-party certified, and chosen for minimal water, pesticide, and energy use. Their fibres are natural, breathable, and durable, sourced with full traceability to protect soil, water, and workers across their supply chain.