Patent ID: 8628365

Claim:
A swim fin having, in combination, a) a blade including an inner thin board, and upper and lower Neoprene sheet or sheets covering upper and lower sides of the board, b) the upper Neoprene sheet defining a foot entrance, c) a forward foot retention strap or straps carried by the blade to extend proximate said entrance and over the foot, d) a rearward retainer carried by the blade to extend above the rearwardmost portion of the blade, e) said forward retention strap and said rearward retainer both being flexible, f) and primary seam binding extending at the periphery of said board, connecting the Neoprene sheet or sheets to the board and also anchoring the forward strap and the rearward retainer to the board, g) and wherein the primary seam binding extends lengthwise and has a C-shaped cross sections along its length normal to said length, h) and including connective stitching extending through upper and lower edge portions defined by both the primary and secondary seam bindings, the stitching extending through edge extent of said board.