Whether it’s to stay loose during a practice or game or ease pain, users rave about the Venom Back, Shoulder and Knee. It’s a cutting-edge, digitally connected wearable back device that uses heat and vibration to warm up, loosen and relax muscles. With nanotechnology, it heats within 90 seconds. Vibration pods feature three different vibration settings. Neoprene wrap allows you to adjust the fit to your preference.