Gemfan F4019 Floppy Proppy 3 Blade

They fold!

The props are good, they fold into a very small area and perfect for storing the drone in a travel box. Flight performance is decent, but nowhere close to rigid props.

Folding 4” props

These little dudes are pretty awesome for my Flywoo Explorer HD4. You should try them

Fantastic props!

The props are well balanced and go together easily, being able to fold them will shrink down quad footprint nicely for transport/storage. That said, they don't really handle hits and turtle mode mistakes very well. I don't think I'll be running 4 inch floppys for any freestyle flying and stick with long range and light proxy flying on them.