".... "elastic strap HRMs" that you just put on
before you tack up and keep on during a ride...."
Some people report that the elastic straps under the
saddle can cause sores as the saddle moves during a ride. I don't know for
sure as mine was purchased specifically to put on after stripping
tack.
Ed
Ed & Wendy Hauser 2994 Mittower
Road Victor, MT 59875