A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and −1.

A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and −1.

The present invention relates to a set of coupling assemblies comprising a right coupling assembly and a left coupling assembly being configured to be mounted on aboard for board sports and to receive respectively a right boot and a left boot, wherein the right and left coupling assembly comprise an inner receiving unit and outer receiving unit, wherein each inner receiving unit comprises a locking arm which is pivotable about a main inner pivot axis from a locked position to a released position and vice versa, wherein each inner receiving unit comprises a pull mechanism comprising:—at least one elongate interlink member which extends between the two inner receiving units, and—a link pull member configured to engage the boot or the inner boot coupling part and to receive a pull force from the boot or boot coupling part when the boot or boot coupling part is no longer held by the coupling assembly and moves away from the coupling assembly, and to be pulled over a pull distance by said boot or by the boot coupling part, wherein the pull mechanism is configured to transfer the pull force and the pull distance to the at least one elongate interlink member, and to convert the pull distance in an interlink pull distance of the elongate interlink member, and wherein said interlink pull distance pivots the locking arm of the other coupling assembly from the locking position to the released position, thereby releasing the other boot.

Disclosed herein is a snowboard deck. The snowboard deck includes a board-shaped deck body on which both boots worn by a snowboard user desiring to enjoy riding in a snowfield are positioned and fixed; a binder hole formed in a hole shape in the deck body and provided with a magnet to fasten and fix the boots worn by the snowboard user with a magnetic force; and the boots provided with metal protrusions connected through the magnetic force from the magnet inserted and fastened into the binder hole.

Disclosed herein is a snowboard deck. The snowboard deck includes a board-shaped deck body on which both boots worn by a snowboard user desiring to enjoy riding in a snowfield are positioned and fixed; a binder hole formed in a hole shape in the deck body and provided with a magnet to fasten and fix the boots worn by the snowboard user with a magnetic force; and the boots provided with metal protrusions connected through the magnetic force from the magnet inserted and fastened into the binder hole.

A sport board binding system includes a receiver configured to be secured to a deck of a sport board, a boot, and an intermediate locking member. The receiver defines a channel extending inward from a periphery of the receiver. The boot is configured to be worn by a user and includes an engagement mechanism. The intermediate locking member includes a lower head connected to an upper head by way of a neck with the lower head selectively housed within the channel of the receiver and the upper head selectively housed within the engagement mechanism of the boot.

A sport board binding system includes a receiver configured to be secured to a deck of a sport board, a boot, and an intermediate locking member. The receiver defines a channel extending inward from a periphery of the receiver. The boot is configured to be worn by a user and includes an engagement mechanism. The intermediate locking member includes a lower head connected to an upper head by way of a neck with the lower head selectively housed within the channel of the receiver and the upper head selectively housed within the engagement mechanism of the boot.

Provided herein are various embodiments for a boot for releasable engagement with a binding having a downwardly facing ledge and a toe strap. The boot preferably contains a sole, a toe portion, and a heel portion. The boot preferably also contains a heel retaining device extending rearwardly from the heel portion of the boot and having an upwardly facing engagement surface at the top of the device which engages with the downwardly facing ledge of the binding to prevent vertical movement of the boot relative to the binding while allowing forward horizontal movement of the boot relative to the binding.

Provided herein are various embodiments for a boot for releasable engagement with a binding having a downwardly facing ledge and a toe strap. The boot preferably contains a sole, a toe portion, and a heel portion. The boot preferably also contains a heel retaining device extending rearwardly from the heel portion of the boot and having an upwardly facing engagement surface at the top of the device which engages with the downwardly facing ledge of the binding to prevent vertical movement of the boot relative to the binding while allowing forward horizontal movement of the boot relative to the binding.

The present invention contemplates a binding system for a snowboards and the like. The system includes a soft-soled boot having a hardened exterior shell consisting of a toe portion and a heel portion, which are linked by at least one sidewall portion. The toe and heel portions include two toe and two heel pegs respectively. The boot includes an instep portion having instep cables for adjusting the boot to the wearer and the cables are adjusted by grommets and tightened in position by at least one resting bar. The binding has a base plate for connecting to the snowboard. The base plate further supports a pair of toe hooks adapted to engage the toe pegs and a pair of heel peg levers adapted to releasably engage the heel pegs of the boot. A grappling hook and ratchet mechanism grabs the resting bar on the boot.