•The double wheels are widened to reduce shaking, suitable for beginners.
•Golden triangle, stability +300%, 3 seconds to get started.
•Tank-type track design, safe and non-slip.
•Stainless steel spring rebounds, smoother and smoother without jamming.
•Multi-layer anti-slip material, noise-reducing and wear-resistant.
•Thickened soft cushion, comfortable and not uncomfortable on elbows.