A monofin comprising: a resilient fin ; wherein said resilient fin further comprises a leading edge and a trailing edge ; a foot pocket cover coupled to said resilient fin; wherein said foot pocket cover is coupled over a portion of said leading edge and said trailing edge; and - at least one foot pocket coupled to said foot pocket cover , characterised in that the fin , further, comprises at least two ribs , - the at least two ribs begin at the back of the fin and continue along the leading edge of the fin to a location approximately two thirds of the way down the fin , wherein - the ribs are a thickening of the edge of the fin , and are extending above the surface of both the top and the bottom of the fin , wherein - the foot pocket cover wraps around the fin so that the back of the foot pocket cover with a gusset is placed over a back of the fin , wherein the front of the foot pocket cover is wrapped around a notch of the fin , and further wherein - when in place on the fin , the portion of the foot pocket cover placed around the back or leading edge of the fin is wider than the portion of the foot pocket cover placed around the front or trailing edge of the fin . a resilient fin ; wherein said resilient fin further comprises a leading edge and a trailing edge ; a foot pocket cover coupled to said resilient fin; wherein said foot pocket cover is coupled over a portion of said leading edge and said trailing edge; and - at least one foot pocket coupled to said foot pocket cover , characterised in that the fin , further, comprises at least two ribs , - the at least two ribs begin at the back of the fin and continue along the leading edge of the fin to a location approximately two thirds of the way down the fin , wherein - the ribs are a thickening of the edge of the fin , and are extending above the surface of both the top and the bottom of the fin , wherein - the foot pocket cover wraps around the fin so that the back of the foot pocket cover with a gusset is placed over a back of the fin , wherein the front of the foot pocket cover is wrapped around a notch of the fin , and further wherein - when in place on the fin , the portion of the foot pocket cover placed around the back or leading edge of the fin is wider than the portion of the foot pocket cover placed around the front or trailing edge of the fin . - at least one foot pocket coupled to said foot pocket cover , characterised in that the fin , further, comprises at least two ribs , - the at least two ribs begin at the back of the fin and continue along the leading edge of the fin to a location approximately two thirds of the way down the fin , wherein - the ribs are a thickening of the edge of the fin , and are extending above the surface of both the top and the bottom of the fin , wherein - the foot pocket cover wraps around the fin so that the back of the foot pocket cover with a gusset is placed over a back of the fin , wherein the front of the foot pocket cover is wrapped around a notch of the fin , and further wherein - when in place on the fin , the portion of the foot pocket cover placed around the back or leading edge of the fin is wider than the portion of the foot pocket cover placed around the front or trailing edge of the fin . <EOS>