I think "floating snorkel" is the common term, but this does not bring up any hits in the search and filtering is also not possible. What is meant is something like this: https://www.galaxus.ch/de/s3/product/arena-schnorchel-swim-iii-schnorchelausruestung-22755499 In other words, a snorkel that is put on frontally. These things are used either for breathing training when swimming or to relieve pressure on the neck. It would be useful to be able to find these products more easily here.

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