This snorkel is designed specifically for the needs of free divers. The ventilation is excellent, because the tube is shorter, has a large bore and is a well-connected anatomical shape without sharp curves. The tube is made from flexible, black material, and a soft silicone mouthpiece fits into the end; this is a swivel mouthpiece so it can be placed at the correct angle for comfortable and long use. The height adjustable mask strap holder has a modern catch.