Providing a much larger sweet spot and reducing vibration by up 80% in comparison to traditional synthetic gut string, check out the Wilson NXT Power 16 Multifilament Tennis String.
With a 45% PU composition, this string has high crystallinity Xycro Micro-Fibres and a Ribbon-like co-polymer core which does an awesome job of increasing tensile strength and reduces tension loss by 15%.
Finally, the NXT Power 16 Gauge String is a #1 rated comfort string according to USRSA, so you know its a string you can trust!
Wilson NXT Power 16 Multifilament Tennis String Set
NXT Power features high crystallinity Xycro Micro-Fibers bonded with polyurethane for an ideal combination of durability and explosive power upon contact. Originally labeled NXT Tour, this string's softness and comfort are about as close as it comes to natural gut. NXT Power features a 15% larger sweet spot and 80% less vibration than traditional synthetic gut string.