Babolat VS Touch Thermogut (Natural Gut) 16 Gauge in Natural Color (Best String for Performance) BEST STRING FOR PERFORMANCE: The Babolat VS Touch Thermogut (Natural Gut) 16 Gauge in Natural Color is unrivaled in its playability, power, control, and comfort. These are the natural gut strings most tour pros use. EXCELLENT FOR ARM ISSUES: Natural gut are some of the softest strings on the market. They help to absorb unwanted vibrations, leaving your shoulder and elbow with far less issues. EXTRA LAYER ADDED FOR LONGEVITY: As most of us know, natural gut strings are awesome to play with, but don't always last very long, and are obviously more expensive than your average set of strings. Babolat addressed this problem with BT7 Technology, which is an added layer structure that increases the durability without losing feel or comfort.