Synthetic/Aluminium Wound.
Pirastro Wondertone Solo strings are a focused and clear synthetic core string. They offer a direct, brilliant and clear tone suitable for advanced students and professionals alike. They have a focused sound and outstanding response.

Features:

• Modern, synthetic core strings.
• The tone is direct, brilliant and clear.
• No background "hiss".
• Outstanding response.
• Outstanding tuning stability.
• Insensitive to variations in temperature and humidity.