Altamira Bionylon Classical Guitar Strings offer a revolutionary blend of tone and sustainability, making them the ideal choice for environmentally conscious musicians. Designed with round, smooth monofilament, the treble strings produce a warm, vintage-inspired tone while delivering excellent acoustic and mechanical performance. Whether you're practicing or performing, these strings provide a beautifully mellow sound that’s rich in character. What sets Bionylon apart is its eco-friendly composition—made from 63% plant-based materials, these strings reduce carbon emissions by over 30% compared to traditional nylon strings during production. Available in both normal and high tension, Altamira Bionylon strings offer a responsible way to play without compromising on quality, tone, or durability. Features: Warm, mellow tone with vintage character Made from 63% plant-derived materials for lower environmental impact Reduces CO₂ emissions by over 30% compared to traditional nylon Excellent acoustic response and mechanical strength Available in both normal and high tension