Yonex has a new string from the Poly Tour collection with the Poly Tour Air. This string features a plushy "HR-Elastomer" built into the string which enhances repulsion and shock-resistance. The Yonex Poly Tour Air 125 16L allows players to hit powerful shots while lessening the impact on one's arm. Composition: Monofilament core finished with high polymer polyester blended with HR-Elastomer. Length: 39 ft. (12m) Gauge: 16L (1.25mm) Color: Blue Yonex Tennis String PTGA125