Certified B Corp Australian brand Hat Body: Pre-washed 100% Natural Cotton Canvas Sweatband: Soft Cotton Twill Clasp Accessory: Nickel Free Rust Resistant Brass Choosing cotton over polyester is better because natural fibers like cotton are biodegradable and more eco-friendly. Cotton is breathable, comfortable, and reduces environmental impact, unlike polyester, which is derived from petroleum and contributes to microplastic pollution. Natural fibers support sustainability and provide superior comfort. We use natural fibres that fit within natural carbon cycles. We only use synthetic fibres where a natural alternative is unavailable so that it won't cost the earth later. We don't do polyester blends so that we can separate components for reuse, recycling or to go back into the earth.