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 place – with no straps and no heel cup – delivering comfort, flexibility, and power.