I got the yellow ones for high viz. Each kick empties ~27000 gallons of water from any type body of water due to the power in these babies.
Awesome fins, never a leg cramp!....plenty of power.
I've always wanted these fins but they're very pricey. Fortunately, the awesome pricing via Online Scuba made it worth it for purchase. YOU WILL LOVE these fins. So much more power with each stroke/kick. Worth the price and highly recommended.