Yonex AS40Shuttlecock is BWF Approved For Tournament, is a high-quality goose feather, high density, uniform shape, not only beautiful but also more stable, more resistant to fight. Featured rough shag hairpieces, the same length, greatly enhance the ball resistance and stability. Goose feathers are treated with a special formula, smooth and soft; resistant to beating, good elasticity, accurate placement.
The Shuttlecock feathers are very thick, relatively resistant to beating, softness, and toughness, and can withstand relatively large impact forces. Good elasticity, nice feeling, no deformation, and much more durable. The feathers are relatively thick, very solid, not easy to fall off, and more resistant to hitting.