Breathable opening on both sides, you can freely through active actions, super light and will not affect your Comes with a bright color in for case it falls out of your mouth which can be used for additional security during use. mouth is soft food-grade silicone, green non poisonous and tasteless, its are very soft, providing comfort and super durability. for 10 9 8 7 6 5 4 3+ action cameras. Hands design, allows you to record point of view images and easily transfer the camera handheld