coyoteblastin
Guest
I went and bought some F1's and found they are a lot stiffer then my Jets. It took a few dives to get use too but there is more power behind them. The F1's work great with my USIA drysuit. The spring straps are awesome compared to my rubber ones on my jets. I hated putting the jets on and taking them off. Overall I do like the F1's better.