These props are pretty sweet just don't crash them, they are super soft material. They fly really good tho, smooth like butter..
Lumenier Butter Cutter 5x4x3 Polycarbonate Propeller CW
Rip it like Wild Willy with this propeller. Lumenier got a bunch of science people on their team to make a propeller with high thrust capacity that would still be efficient. After many tries and lots of sciency calculations, they arrived at this design.
The propellers are made out of durable polycarbonate material, which ensures that hitting ghost branches, gates and other minor collisions won't affect your flight!