It's the same material as a garbage or leaf bag. Thin, easily torn, made for one use only. The wind tore mine to shreds in less than an hour of riding in a storm, (I ride hard, even in a storm) but helped keep my upper chest and crotch fairly dry, and the hood easily fits inside your helmet. And it's so tiny, about the same size as 4 Trojan Rubbers, so it will fit right into your on-bike tool box if your's has one.
I'll be looking for a "real poncho" soon, to keep in my saddle bags. This ain't it. But I'll probably buy this again, and keep it in my tool box, for "emergency chick use".