Volkl Vostra V7 Tennis Racquet hats It features an Optimized Tubular

It features an Optimized Tubular Construction (OTC) honeycomb polymer core and a carbon graphite hitting surface (GHS) for great feel and playability with Extreme Spin technology

GEN-PROTECT

rubber outsole

but also quick-drying to keep sweat off your body and features a breathable design to keep you cool without chafing

As it says on the shoe

Volkl Vostra V7 Tennis Racquet hats It features an Optimized TubularIntroducing the Volkl Vostra V7! With this update, Volkl overhauls the specs to deliver the perfect tool for playing aggressive tennis. At 317 grams strung and boasting a 320 swingweight, the V7 feels explosive from the baseline, and there is more than enough spin potential to bring the ball down hard. In addition to tweaking the weight, balance, and length, Volkl thickens the beam for a more stable and powerful response.