B00HQZJ1ES Tourna Quasi-Gut Armor

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Tourna Quasi Gut is a premium multifilament that delivers maximum comfort, touch, and feel. Its meant to mimic the softness and playability of Natural Gut.
Quasi Gut Armor string is a great option for players that have tennis elbow given the soft and elastic nature of the string
Constructed with thousands of twisted microfibers, each infused with a premium thermo-elastic polyurethane resin, and wrapped with two ribbons of co-polyester
The soft PU infused multifilament inner core reduces shock and vibration, keeping the string comfortable and arm friendly while also making this a very powerful string

The poly ribbons increase the durability and reduce the fraying that multifilament’s experience over time