For those of you who don’t know, I am an avid swimmer, and I can usually be found swimming laps at an indoor pool several times a week.  Recently at the pool, I finally went digging through the various swim fins and other equipment that the pool makes available for swimmers’ use.  Kickboards notwithstanding, the item that I’ve found most useful for my workout is a pair of short fins.  But amongst the various items in the big bin of stuff is a monofin.  The monofin looks like this:

The monofin

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