Just to Jump In (Pun intended) with a comment here, although I don't use my Polar gear for swimming, I have worn it in the Pool, in the Jacuzzi, in the Sauna, Showered with it on, and while getting drenched River Rafting.
The ordinary WearLink Transmitter module (5KHz) for the FT60, FT80 and other Polar HRMs worked fine in all the above situations, regardless if I was wearing a tshirt, flotation vest, or bare chested and even when drenched and submerged. I always wear the chest strap tightly snugged. However, as not doing kick turns I haven't had the slipping problem others have depicted. And, the prevailing understanding is that the T31 semi rigid plastic straps are superior for swimming.
The 2.4GHz WIND WearLink Transmitter (which affixes to the identical textile WearLink Chest Strap also worked, so long as chest immersion into the water was not sustained for more than a few moments nor too deep. I did not find that my RS800CX dropped out when I jumped into the pool, or river, nor sitting in the Jacuzzi with the Transmitter just at water level. When my chest was submerged for more than just a few moments the 2.4GHZ WIND signal won't transmit through continuous water. However, a saturated flotation vest, or saturated tshirt, etc. did not prevent the WIND signal from working properly.
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Last edited by MusicLaw : 23-04-2012 at 16:06.
Reason: Corrected Typo: 5MHz to 5KHz