On every snorkel, is a snorkel keeper which attaches to your mask. The snorkel keepers that come with snorkels are made of plastic and will break. Then you are without a snorkel and have to relate to renting one. Dont be disappointed, carry a spare on all vacations. This neoprene snorkel keeper fits over the snorkel head and then wraps around the snorkel and for more specific directions, watch our How to Video. Made of quality neoprene with sewn trim edge.