Tecnifibre X-One Biphase 18 is Tecnifibre's flagship playability tennis string

Precision nibs release tight muscle using 100% natural acupressure and heat

Fits racquets with extended lengths

Durability: 8

WrightSock Double Layer Coolmesh II Quarter Socks Ball Type_Beginner Tecnifibre X-One Biphase 18 isWrightSock Coolmesh II Quarter Socks are fabricated with a patented Double Layer design that reduces the causes leading to blisters: friction, moisture and heat. With a versatile, multi sport contoured fit, youll be able to run, hike, walk or bike with cool and dry feet. This system delivers lightweight breathability and all around comfort. Outer Layer: Lightweight Dri WRIGHT II with mesh panel for maximum breathability and maximum moisture control.