: 1. Size: 666.5 square centimeters. Weight: 66 grams (including packaging), bare weight 37 grams 3. Material: ABS+silicone Features: 1. How to use it: If you have a lot of activities, it might be easier to start using it. Hold it with your mouth first. When you inhale, use your mouth to inhale. Can also cooperate with abdominal contraction. This tool can not only exercise seldom used facial muscles, but also with age. Increase facial sagging and sagging. It is also a small tool to exercise abdominal breathing. Develop healthy breathing habits are good for physical and mental health. You can happily do facial exercises and exercise facial muscles every day for 2 to 3 minutes, with the product in your mouth. Plan to do face-to-face breathing exercises