Description de chez Amazon USA : - Aquila Red Series strings have an extremely comfortable player feel and a greater volume than standard strings - Improved composite material and proprietary design makes the tone brighter and more responsive across the fretboard - Proprietary composite material also absorbs less moisture than other synthetic strings to assure tuning stability - Each string shares a similar diameter, yet differs in material density providing a uniform feel and enhances intonation - To learn more, please see our Product Description below