Abstract: A swimming aid device has a generally grid-shaped frame, a toes strap, an instep strap, and a heel strap. A reinforced rib and a crossbar are disposed on the front portion of the frame. The toe strap is disposed on the front portion of the frame. The instep strap is disposed on a central portion of the frame. The heel strap is disposed on a rear portion of the frame. A female fastening device is disposed at an end of the toe strap. A male fastening device engages with the female fastening device. A first blocking plate is disposed at an end portion of the cross strap. The first blocking plate has a first distal protruded bar. A second blocking plate is disposed at an end portion of the instep strap. The second blocking plate has a second distal protruded bar.

Abstract: A swimming aid assembly comprises a generally grid-shaped frame with transverse bars and longitudinal rods. Each transverse bar connects a leaf. The reinforced ribs are disposed on the frame. A first retaining ring is at an end of the toe strap. A longitudinal instep strap and a longitudinal first heel strap are crossed by a first cross strap. The first heel strap is at an end portion of the first cross strap upward. The longitudinal instep strap and a longitudinal second heel strap are crossed by a second cross strap. The second heel strap is at a middle portion of second cross strap downward. The first cross strap is at an end portion of the instep strap. The second cross strap is at a center portion of the instep strap. A second retaining ring is at an end of the instep strap. A third retaining ring is at an end of the first cross strap.

Abstract: A flipper assembly comprises a rectangular, grid-shaped frame with a plurality of longitudinal strips spacedly disposed therein, a plurality of danglable leaves, and a plurality of transverse crossbars. Each of the crossbar is disposed under the frame spacedly and attached to an upper surface of a leaf respectively. Two pairs of straps are disposed at two opposite sides of the frame respectively. The total weight of the largest sized flipper assembly is only 710 grams. Another flipper assembly comprises a sandal, a rectangular frame with a plurality of longitudinal strips spacedly disposed therein, a plurality of danglable leaves, and a plurality of transverse crossbars. Each of the crossbar is disposed under the frame spacedly and attached to an upper portion of a leaf respectively. A strap is disposed on the upper surface of the sandal.