--Food-grade silicone is refined, safe and odorless, soft and elastic, not easy to deform, and has a long service life.
--Tongue rest design, stylish and simple, comfortable and easy to bite, effectively prevent masseter muscle fatigue, and bring a better diving experience.
--The index adjuster is compact, small in size, light in weight, easy to carry without taking up much space.
--Silicone divider regulators fit most regulators and exhausts for easy installation