- Leading guitar strings: phosphor bronze wrap wire with our proprietary featherweight NANOWEB coating for a rich, full-bodied tone that lasts longer and a smooth, comfortable feel. - Brilliant tone: widely regarded as among the best acoustic guitar strings, with consistent, reliable performance across gauges from light to heavy. - Corrosion resistant: NANOWEB coating protects against sweat, corrosion, humidity and rust, helping the strings retain their out-of-the-box tone longer than many coated or uncoated options. - Made in the USA: lab- and field-tested, manufactured to exacting specifications in a state-of-the-art facility; versatile, durable and dependable for steady performance. Ideal for: - Live performances requiring clear projection and durability - Studio recording needing consistent tone and feel - Regular practice in environments with humidity or moisture exposure