Happy U tread

Anti-fog coating

Improved competition fit with more bust coverage

Ponytail-friendly opening at back of crown

Perfect for hiking

FINIS SlipFin Pro Swim Fin boys-training-suits-22016 Happy U treadSlips on. Stays put. No straps. No heel. Just a natural extension of your foot. Traditional swim fins can feel bulky, heavy, and restrictive. SlipFin Pro is designed to give swimmers the power of a fin with a lighter, more natural feel that supports good technique and race pace rhythm. SlipFin Pro slips over the front half of the foot while leaving your ankle and heel completely free. Its patented design creates a gentle seal that holds the fin in