The C4 Dual Moon fins are hands down the best fin I have ever dove. During all day double sessions I am noticing much less leg, ankle, and knee fatigue than before. Granted I thought that would occur going to a softer fin – what I didn’t expect is still having the required forward force while at depth during a rescue. I noticed little difference between when it was just me, and when I was assisting someone, without it slowing me down.
I can say that I am a C4 convert – I only wish I had gone to them earlier!