This fin is for lady's use . Coco fin can catch water firmly by bending central blade area while down kicking . The fins have epoch-making jet hole , and the entrance is wide .

Water is caught and funneled into the jet hole, or funnel, running down the fin.

But the jet hole is tapered. So, the hole can produce strong jet water stream in spite of weak lady's foot and it can make tremendous propulsive force . The foot pocket softly matches booties of size from 23 to 24.5 cm . 

SIZE: S (matches booties of size 23-24.5 cm)