I live in a hot AND humid area, blegh.  I've found the Saratoga works best:

http://www.smartpakequine...-1758p.aspx?cm_vc=Search

Even then though, if it's 90F or hotter I have to take it off.  It also probably wouldn't be a good choice for a horse that's hard on clothes.

The most durable would be the Kensington, hands down:

http://www.smartpakequine...-2294p.aspx?cm_vc=Search

Dang thing is like a suit of armor for horses!


image"Avoid loud and aggressive persons, they are vexations to the spirit." - Desiderata, Max Ehrman. 1926. image