FCS II MB - MATT BIOLOS PC TRI FIN SET - BLUEFCS II MATT BIOLOS TRI FINS NEW COLOURS Designed by revered shaper Matt "Mayhem" Biolos. Same proven template with a new look. Overview The MB template offers freedom to perform tight turns in the pocket with an emphasis on speed. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force. Ideal Conditions A