Iron temperature varies by fibre: Low (110°C): silk, wool, synthetic blends — steam carefully. Medium (150°C): cotton, linen, rayon — slightly damp for best results. High (200°C): linen and cotton — iron while damp for crease removal. Never iron: delicate lace, velvet (use steam only), embellishments. High-formality contexts require low-wrinkle fabrics (lyocell, merino, cupro) to minimise ironing frequency when travelling.