FCS II Album Twin Keel Performance Glass Twin Fins Koken durable and lightweight for the

durable and lightweight for the toughest adventures

With PermaFrost™ polyurethane insulation and a ColdLock™ gasket

The rounded shape is full and expressive

Constructed entirely from 100% recycled polyester ripstop

featuring Mizuno's renowned Wave technology

FCS II Album Twin Keel Performance Glass Twin Fins Koken durable and lightweight for theThe FCS II Album Twin Keel Performance Glass Twin Fins are designed for high performance twin fin surfing, offering a refined balance between classic keel speed and a more responsive, modern feel. Developed for contemporary keel twin models, this set narrows the gap between a traditional keel template and a performance twin template, making it a strong option for surfers who want drive, flow, and cleaner directional control. The template follows a