I have seen something called rain chaps.You can put on your poncho and then the chaps remaining fairly dry.I feel the chaps would offer better venting.I plan on getting a pair to go with my GI issue poncho. The versatility of a poncho ranks up there with a bandana.The military issued Gortex suits and now issues a small tarp to take the ponchos place. The poncho is a multi tasker (thank you Alton Brown).A rain suit is just a rain suit....

BOATMAN
John