"Product Contents: 6 pieces of jaw trainers, 3 colors, blue 18.14 kg, red 22.68 kg, black 27.22 kg, two trainers for each color.Practical Design: With this jaw trainer, you can strengthen your facial strength and shape a strong, chiseled jawline using only your chin muscles (one of the main muscles used for chewing).Improve your face: This exercise can activate facial muscles, increase facial blood flow and oxygenation, can tone your facial contours, shape your jawline, and thus shape the contours of men and women.Portable and convenient: Our products are small and easy to carry, you can exercise your jaw muscles while working, walking or watching TV, and exercise quickly and comfortably anytime, anywhere.Easy to clean: Our jaws are designed with no holes, which can reduce the growth of bacterial residues and are easier to clean after each training. If you want to deep clean, just use a toothbrush and toothpaste to clean, which is convenient."