【MEGA Jumping Fiber】Black & Blue ■ Produced by Hijiki Ikuyama, the Guinness World Record holder for skipping rope (6 titles) ■ Newly developed beautiful fiber rope specification overcomes rope challenges: Doesn't leave marks! Doesn't break easily! Doesn't stretch! Easy to jump with! ■ By putting weights in the grip, the wrists are stabilized, making it easier to do multiple jumps with a beautiful form. ■ Jumping with a rope of appropriate weight leads to jumping with a beautiful posture, strengthening the core, improving balance, and correcting skeletal misalignment. ■ It is the very coordination exercise that schools are currently focusing on. ■ Durable rope with fiberglass fiber bundles. ■ Monitors were conducted across all age groups, and the 16.5cm grip was adopted, which was evaluated as the easiest to jump with. ■ Grip cover keeps it from being cold even in winter. ■ Comes with a storage bag for convenient portability. 【Double Unders Master】Black Certified jump rope by Katsumi Suzuki, the "World Jump Rope Champion" with a record of 441 triple unders. Triple unders are cool if you can do them! Let's learn theコツ (tips) and be able to jump! This jump rope is designed specifically for double unders. By putting weights in the handles, the elbows are tightened, and the weight allows the arms to move naturally in a fixed position, enabling faster jumping. By practicing with this, rapid improvement can be expected. Once you learn how to jump, you'll be able to jump with regular jump ropes too! Made in Japan Handle/Rope: PVC Cap: PE Weight: Metal/PVC Thank you for viewing.