A surfboard having a core, a first elongate spring member located adjacent an upper side of the core, and a second elongate spring member located adjacent a lower side of the core, wherein the first elongate spring member extends substantially from a nose portion of the surfboard to a tail portion of the surfboard.

A surfboard having a core, a first elongate spring member located adjacent an upper side of the core, and a second elongate spring member located adjacent a lower side of the core, wherein the first elongate spring member extends substantially from a nose portion of the surfboard to a tail portion of the surfboard.

A water activity board is described, comprising: a. a plurality of sensors, b. a data unit interconnected to the sensors. c. a communication unit interconnected to the data unit. wherein the communication unit is configured to communicate to a cloud-based database. In some embodiments the sensors are selected from a group consisting of Environmental sensors, sea platform sensors and User sensors.

A water activity board is described, comprising: a. a plurality of sensors, b. a data unit interconnected to the sensors. c. a communication unit interconnected to the data unit. wherein the communication unit is configured to communicate to a cloud-based database. In some embodiments the sensors are selected from a group consisting of Environmental sensors, sea platform sensors and User sensors.

Disclosed is a kite or wing with a canopy made of a film material which cannot be folded without being creased but having one or more strips of flexible material running across the canopy, wherein the flexible material can be folded without creasing, The kite or wing can be folded along the flexible material strips and then rolled up from the canopy ends for storage or transport.

Disclosed is a kite or wing with a canopy made of a film material which cannot be folded without being creased but having one or more strips of flexible material running across the canopy, wherein the flexible material can be folded without creasing, The kite or wing can be folded along the flexible material strips and then rolled up from the canopy ends for storage or transport.

The swivel lock quick release device is adapted to selectively attach a user to a sports equipment. The sports equipment may be watersports equipment, such as a surfboard, a kite surfing apparatus, a stand-up paddle board, sailing equipment, a wake board, etc., or land sports equipment, such as fishing, camping, climbing, animal collars or leashes, tactical rifle apparatus, and hunting equipment. The swivel lock quick release device can have a pull release and a protrusion, the pull release and the protrusion being adapted to be selectively engaged in a locked position is provided. A slide handle, a portion of the pull release, is adapted to be selectively moved in a coaxial direction by the user to disengage the pull release and the protrusion. The pull release can also be adapted to rotate or swivel around the protrusion.

A watercraft paddle assembly for enhancing comfort while paddling a watercraft includes a paddle that has a handle portion is elongated and a paddle portion. A roller attachment is coupled to the handle portion and the roller attachment is distally positioned with respect to paddle portion of the paddle. The roller attachment has an attached section that is oriented at an angle with a roller section. A roller is rotatably integrated into the roller section of the roller attachment such that the roller can be gripped by the user. The roller is oriented to rotate about an axis that is oriented perpendicular to a lengthwise axis of the paddle to facilitate the user to grip the roller and the handle portion of the paddle in a preferred manner for paddling.

A surfboard with an electric drive (2), a battery for the electric drive (2), said battery being arranged in a battery housing (3), a first recess (4) for the battery housing (3), and a handle (5) on the battery housing (3), wherein the handle (5) is designed as a bracket handle which is mounted pivotably around a respective centre of rotation (21) at each of the handle ends on opposite sides (6) of the battery housing (3), and in each case a lug (9) protrudes from the base side of the recess below the centres of rotation (21) inside the first recess (4), and at each handle end of the bracket handle a second projection (33) is formed, which has a curved edge (34) and which rests on the lug, and a distance between a contact point of the curved edge (34) with the lug (9).

A surfboard with an electric drive (2), a battery for the electric drive (2), said battery being arranged in a battery housing (3), a first recess (4) for the battery housing (3), and a handle (5) on the battery housing (3), wherein the handle (5) is designed as a bracket handle which is mounted pivotably around a respective centre of rotation (21) at each of the handle ends on opposite sides (6) of the battery housing (3), and in each case a lug (9) protrudes from the base side of the recess below the centres of rotation (21) inside the first recess (4), and at each handle end of the bracket handle a second projection (33) is formed, which has a curved edge (34) and which rests on the lug, and a distance between a contact point of the curved edge (34) with the lug (9).