A kayak that collapses to form a backpack structure. The kayak includes a plurality of removably connectable hull members. The hull members include at least a middle section, a front section, and a rear section. The middle section comprises a tapered complex body having a cavity. The tapered complex body has a width larger than width of the front section and rear section such that the tapered complex body can receive the front section and the rear section in the cavity of the middle section. A plurality of bolts are configured to removably connect the hull members. The bolts provide pressure to a rubber gasket for connecting the front section and the rear section to the middle section. A cockpit is formed by removably connecting the front section and rear section to the middle section via the bolts. A seat member is removably attached to the cockpit.

A kayak that collapses to form a backpack structure. The kayak includes a plurality of removably connectable hull members. The hull members include at least a middle section, a front section, and a rear section. The middle section comprises a tapered complex body having a cavity. The tapered complex body has a width larger than width of the front section and rear section such that the tapered complex body can receive the front section and the rear section in the cavity of the middle section. A plurality of bolts are configured to removably connect the hull members. The bolts provide pressure to a rubber gasket for connecting the front section and the rear section to the middle section. A cockpit is formed by removably connecting the front section and rear section to the middle section via the bolts. A seat member is removably attached to the cockpit.

A portable air-cushion bag comprising an air cushion and a bag body, wherein the air cushion is fixed with the bag body, and a storage space with an opening is formed by the air cushion and the bag body. The air cushion is provided with an inflation port for facilitating air inflation and deflation. The edges of the air cushion are sealed, and the air cushion is internally provided with a containing space for containing air. A water-permeable structure is arranged at one end of the bag body, which is far away from the opening of the storage space. When the inflatable boat isn't used anymore, it is deflated, folded, and placed into the storage space, thus achieving a storing function of the air-cushion bag. The inflatable boat may be inflated by using the air-cushion bag instead of an air pump or other inflation equipment, which greatly eases the storage and carrying.

A portable air-cushion bag comprising an air cushion and a bag body, wherein the air cushion is fixed with the bag body, and a storage space with an opening is formed by the air cushion and the bag body. The air cushion is provided with an inflation port for facilitating air inflation and deflation. The edges of the air cushion are sealed, and the air cushion is internally provided with a containing space for containing air. A water-permeable structure is arranged at one end of the bag body, which is far away from the opening of the storage space. When the inflatable boat isn't used anymore, it is deflated, folded, and placed into the storage space, thus achieving a storing function of the air-cushion bag. The inflatable boat may be inflated by using the air-cushion bag instead of an air pump or other inflation equipment, which greatly eases the storage and carrying.

A shoulder strap for devices adapted to carry loads, particularly on the back of a user, has a side widening toward the sternal area of the user and an arched shape, the dimensions and shapes being designed so that in worn condition the side widening can rest on the thorax area, below the cervicothoracic imaginary line and above the breast, while the section extending downward beyond the side widening overlaps the side area of the thorax, the breast being positioned in the area next to a concave side edge that bypasses the breast. A buoyancy compensator for diving comprising equipped may be equipped with one or more shoulder straps as described.

A multi-media tablet holder is provided and includes a first retention member, a second retention member, a pair of slide pins, at least one extension spring and a handle. The first retention member includes a first retention plate and a first retention rail. The second retention member includes a second retention plate and a second retention rail. The first and second retention rails are sized to receive thickness of a multi-media tablet. There is also provided a multi-media tablet holder including a retention member, a handle assembly and an articulating mechanism for pivoting and rotating the retention member relative to the handle assembly.

The collapsible water vessel is deployed as either a kayak or a canoe. The collapsible water vessel is portable and is stored as or in a backpack. The collapsible water vessel deploys with a bottom configuration selected from the group consisting of a normal bottom, a deep V bottom, and a flat bottom. The collapsible water vessel comprises an outer frame, one or more ribs, one or more seats, an outer shell, a flooring bladder, and a plurality of elastic cords. The outer shell provides a barrier between the interior of the collapsible water vessel and the water within which the collapsible water vessel is placed. The outer frame, the one or more ribs, the one or more seats, the flooring bladder, and the plurality of elastic cords form the physical structure upon which the outer shell attaches.

The collapsible water vessel is deployed as either a kayak or a canoe. The collapsible water vessel is portable and is stored as or in a backpack. The collapsible water vessel deploys with a bottom configuration selected from the group consisting of a normal bottom, a deep V bottom, and a flat bottom. The collapsible water vessel comprises an outer frame, one or more ribs, one or more seats, an outer shell, a flooring bladder, and a plurality of elastic cords. The outer shell provides a barrier between the interior of the collapsible water vessel and the water within which the collapsible water vessel is placed. The outer frame, the one or more ribs, the one or more seats, the flooring bladder, and the plurality of elastic cords form the physical structure upon which the outer shell attaches.

A portable vessel includes a hard shell front hull section, a hard shell aft hull section, a flexible water tight material hull section affixed to the front hull section and the aft hull section in a water tight manner, the material section forming the middle portion of the hull of the vessel, and a tension-adjustable frame assembly. Tensioning of the frame assembly during assembly of the vessel causes tensioning of the material hull section from a less than taught state to a taught state about the frame assembly and wherein the disassembled components of the vessel may be configured into a backpack configuration for portage by a user.

A portable vessel includes a hard shell front hull section, a hard shell aft hull section, a flexible water tight material hull section affixed to the front hull section and the aft hull section in a water tight manner, the material section forming the middle portion of the hull of the vessel, and a tension-adjustable frame assembly. Tensioning of the frame assembly during assembly of the vessel causes tensioning of the material hull section from a less than taught state to a taught state about the frame assembly and wherein the disassembled components of the vessel may be configured into a backpack configuration for portage by a user.