Flying Diamonds of California Bing Speed Hold your hat! If speed is what you need, this is your fin. The scimitar outline, speed foil, and stiff flex of this fin make it amazingly fast down the line whether on a mid-length or any log with speed in its DNA. We make this fin as stiff as its design and Volan lamination allow…its racy profile and slender build will allow ample flex without getting wiggly or cavitating. Ideal for open faced waves that peel and allow building to terminal velocity.