YONEX Astrox 99 Play 4U Unstrung Badminton Racket

Muscle Power Frame For High-Level Control Features:

– Isometric – Muscle Power Frame Specifications:

– Frame:

Aluminum – Shaft:

Steel – Weight Grip Size:

U (105g and below) G4 – Stringing Advice:

U 16-20lbs Technologies:

Isometric:

– Enlarged Sweet Spot:

ISOMETRIC™ technology continues to help the world´s greatest players achieve global success.

Developed over 30 years ago, the ISOMETRIC™ design increases the sweet spot by 7%*.

Compared to a conventional round frame, a square-shaped ISOMETRIC™ racquet generates a larger sweet spot by optimizing the intersection of the main and cross strings.

ISOMETRIC™ delivers greater control without sacrificing power.

ISOMETRIC™ is a Trademark of Yonex CO., LTD.

*Tested by Yone MUSCLE POWER Frame:

– Unity of String & Frame:

Muscle Power locates the string on rounded archways that eliminate stress-load and fatigue through contact friction.

This construction creates total unity of the string and frame through closer and tighter contact.