Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Because "tri"

spits

I want the new garmin HR - tri strap.

Oooh, nice. Will look to get one when I get my 920XT (or equivalent) early next year...

Y U so pricey.

Because it does more than just being an ANT+ transmitter.

ANT+ attenuates really badly through even a small amount of water, so this buffers all of your HR data until you are out of the water, before sending it to your watch.