A lightweight surfboard that is rigid yet provides uniform flex characteristic without the use of a traditional wooden stringer includes a stringerless blank foam and a set of channels shaped into a top portion of the body of the surfboard. The set of channels comprises a pair of adjacent, axially extending elongated concave grooves that run along the length of the set of channels, meet at their end points and form a convex center section. The convex center section of the set of channels provides the support to prevent the board from breaking due to the bending of the surfboard while being ridden on the wave. A laminating layer may be glassed on the set of channels for additional strength. The laminating layer may include fiberglass cloth, Kevlar, carbon fiber or any suitable material.

A flexible, reusable protective sports board sleeve for use inside of a sports board bag comprises a first panel and a second panel. The first panel is joined to the second panel along the respective outer edges of the panels thereby creating an overlapping pocket, wherein the overlapping pocket receives a sports board through the sleeve's tip end, and the bottom edge of the sports board sleeve allows attachment to the tail end of the sports board. The sleeve is made of a flexible, wax-resistant material that allows the sports board to easily slide in and out of a sports board bag without wax sticking to the inside of the sports board bag. There are both horizontal and parallel longitudinal lines printed on the sleeve to help users customize the dimensions of said sleeve by cutting along the horizontal and parallel longitudinal lines.

A surfboard core and a stringer array embedded in the core to modify handling characteristics of the board.

A standup paddleboard outrigger includes a long, narrow, lightweight displacement hull and a pair of outrigger pontoons mounted to a bridge. The two parts disengage for easy storage and transport. The hull has a platform to stand on. Paddling with a long handled paddle propels the craft through the water. The outriggers provide lateral stability/support and actuate the rudder in order to make turns. When a person stands on the platform and shifts body weight, the rudder will rotate to the right and the craft will turn to the right. The more weight that is shifted, the greater the turning action. The responsiveness to the shift of body weight can be adjustable for personal preference either firmer or more flexible, as is the turning response of the rudder fine or coarse turning.

A board carrier uses a belt configured for wearing around a person's waist. A hook bag in the belt has a downwardly facing entry with a closure. Proximal and distal ends of the hook are joined to the belt by length adjustable straps. The board is positioned within the hook with three-points of mutual contact between the board and the interior of the hook. The hook may have a spring clamp for securing a paddle. When not in use the hook and straps are placed within the hook bag.

A sports board comprises, at a minimum, a top layer, a bottom layer, and a core in between them. A structural element with puzzle piece shape fits into a correspondingly shaped seat formed by the core, in between the top and bottom layers. The shape of the structural element prevents the structural element from being dislodged by shock forces frequently associated with use of the board. Machined or molded features are provided that penetrate or partially penetrate the structural element. These features, which are filled or included with resin, adhesive or another chemical bonding agent, resist horizontal shearing between the structural element, the core, and the top and bottom layers. A leading portion of the structural element protrudes out from in between the top and bottom layers, forming a bumper that acts as the first point of contact between the board and the ground or an obstacle.

A retractable fin watercraft accessory that provides steering and tracking for a watercraft such as stand-up paddle boards. The retractable fin system gently retracts as it comes in contact with subsurface objects such as rocks, logs and such, allowing the watercraft to freely pass over the object. The system includes a sloped leading edge which can more easily slide past an obstacle. The retractable fin system simply attaches to the watercraft's existing fin mounting box and can be removed from the watercraft without altering the original state of the watercraft prior to being attached. No drilling, welding, gluing or other such custom fabrication is required. The system allows for quick interchangeability between the retractable fin and various rigid style fins, depending on the user's preferences.

A sport harness for use with a kite or other propulsive device having a quick release feature whereby the user may release himself or herself from the harness while being pulled by a kite. The quick release feature including an interconnection between a spreader bar and one part of a two part waist band closure whereby releasing one end of the spreader bar causes the closure to separate. A harness having vent openings. An overlay for impeding tangling of lines with a harness.

The systems and methods described herein provide hands free motor control mechanisms based on the natural and inherent movements associated with an activity of interest, and can be combined with gesture communication based upon defined movements by the participant.

A water diffuser system and a water sports board with a water diffuser system installed thereon, wherein the water diffuser system can improve stability of a water sports board by modulating the cavitation and turbulence caused by the fin system of the water sports board. The water diffuser system includes one or more water diffusers. The one or more water diffusers can be located at the tail edge of the bottom surface of the water sports board. The water diffusers can have rigid hydrofoil structures that are able to modulate the turbulent flow and cavitation caused by known fin systems.