I've got a Camelbak mule (70 oz of water) and use it
routinely when motorcycling all day long in ultra hot
weather. Wouldn't leave home without it (infact, I wore
it most of the day at Tevis - it doubles as a backpack).
I've worn it a few times on horseback and had no problems.
The main drawback is that you get a sweaty back, and when
it's empty you need to get the horse used to the sound of
sloshing (right Tina? :-)
The main advantage is the minimum amount of activity
required to drink. You move the tube up to your mouth.
You drink. You open your mouth and the tube drops out.
I know when my husband and I went to Utah on motorcycles,
he wore one and I relied on water bottles stashed on the
front on my bike. I got dehydrated, he didn't. When you're
really tired and really hot, having to reach down and grab
a bottle is just *a little* too much, so you wait longer
than you should between sips.
-- ************************************************************** Lucy Chaplin Trumbull - elsie@calweb.com Displaced English person in Sacramento, CAhttp://www.calweb.com/~elsie http://www.calweb.com/~trouble **************************************************************