The newest protective coating improves the ever popular king of natural guts making Babolat VS Team BT7 one of the most sought after strings around. Improving on the previous Thermogut coating, the new BT7 treatment claims to increase longevity by up to 15%, increase durability by 25%, and improve the resistance to humidity by nearly 60%. In addition to the new coating, Our testers found that the improved coating made this string play very slightly stiffer than the original VS Touch, but still provided all of the comfort and pop they love. Evidence of fraying was also lessened, hinting at the new improved durability. Definitely designed to be a favorite among all court players seeking ultimate feel, power, and most importantly, comfort, VS Team remains the very definition of natural gut that other companies aspire to match.