Bob and Brad Power Vibration Yoga Balls - Bob and Brad Double Ball Set (Black and Blue). Experience deep relief! The Bob and Brad Power Vibration Yoga Balls are designed to precisely massage small muscle groups. The high intensity deep vibrations penetrate the muscles to quickly relieve plantar fasciitis muscle tension fasciitis and trigger point pain ideal for relaxing the fascia and reducing fatigue especially for multiple areas such as the shoulders neck back legs and feet. The special texture on the surface enhances the massage effect helping to efficiently eliminate sports aches and pains as well as daily muscle tightness achieving deep relaxation. The product is lightweight and portable (only 0.5 lbs 3.3 inches cube) and easy to use (equipped with 4 AAA batteries no need for lengthy charging) allowing you to enjoy professional-grade physical therapy anytime anywhere. Set includes one black and one blue two vibrating balls cost-effective combination to meet different needs. Made of safe and environmentally friendly ABS+rubber material sturdy wear-resistant and non-toxic comfortable and stable to the touch.Bob and Brad offers a money back guarantee and the support team responds within 24 hours allowing you to buy with peace of mind. Upgrade your exercise warm-up and recovery system instantly experience comfort and relaxation!