So first ... I'm diving and I've gained this snorkel to save on the water surface compressed air, not the pure snorkeling. as is customary in times Scuba diving now, you also have a lot of stuff on man. Now if you are with several people in the water, it can happen that you get stuck with the snorkel equipment in any other. this is where the fastening tape on the mask proved to be inadequate because the fastening clip can not be closed and torn off under tensile loading. and so my new snorkel disappeared into the depths. a diver was not a hit with the salvage of the attachment of the old and two cable ties the problem should also gelöst.bastelei but at this price no longer be necessary. from pure functionality, the snorkeling great. Although is not quite tight (use only on the surface), but better than anything I know. so I can snorkel, after the modification, recommend it to anyone. should perhaps rework the manufacturer here. the pure snorkelling is a danger that you remain somewhere related to the thing, but rather small. hence my nagging applies only for scuba diving.