polar oh1 oh1+ swim case / clip

oh1 / oh1+ swim clip to put on glasses
two STL:
- the one named strong cannot be removed by fingers, so you are sure that it won't fall during swimming. To use when swimming in open water
- the one named softer can be removed by fingers, to use in a swimming pool.

100% and at least 0.15 for the clip to print well

Enjoy

Update 27.07.19: tested a lot of times, ocean and swimming pool, works really great, not lost, even one time.