The Heated waistband, with wraparound cover, offers three heat settings, so you can always find the perfect temperature. Providing instant, comfortable heat, this waistband is ideal for relieving tension, aches, pains and period cramps. Designed with comfort in mind, it’s made from soft, gentle materials that won’t cause irritation or discomfort to your skin. Connects to most power banks (not supplied) via USB-A.