The invention is a portable, easy to assembly camp bunk bed. The invention has a bunk frame system that is designed to be used with any camp cot bed The basic system features 2 frame assemblies, each frame assembly consists of 2 vertical stanchions and 2 lateral support rods. The vertical stanchions each have two cot bed support blocks with longitudinal support pins installed. Lateral support rods are used to secure the vertical stanchions together. In one style, the frame is secured with hook and loop type fastener straps. In the preferred style, the straps are replaced with a new fastening system for the cot using threaded posts and knobs. The cot is also modified so that it is designed specifically for the preferred bunk bed system. Finally, adapter posts are used to allow the bunk bed to be converted to a singe cot, if desired.

Various embodiments for a collapsible cot are provided. A collapsible cot can include a first telescoping member, a second telescoping member, and folding support mechanisms. Each of the folding support mechanisms can include a crossmember, a first arm having a first end pivotably coupled to a first side of the crossmember and a second end slidably coupled to the first telescoping member, and a second arm having a first end pivotably coupled to a second side of the crossmember and a second end slidably coupled to the second telescoping member. The second end of the first arm and second arm can include a coupler having a cross-section having a shape and size similar to a cross-section of the first telescoping member and the second telescoping member.

New forms of sand-resistant towels, mats, and other textiles, devices, systems and methods are provided. In some aspects of the invention, a beach towel or mat with an inherent sand guard at its edge, and around its periphery, is provided. In other aspects, the guard comprises an internal inflatable skeleton, optimized to demark a home base and prevent small children from wandering from a play area on or about the home base. In still other aspects, the towel or mat is configured for packing and toting by folding and rolling techniques, and the towel or mat presents specialized packing, toting and other devices, such as a sealable pocket(s), reversible self-holding strap(s) and a shoulder strap(s), when so folded and rolled. In several embodiments, the profile and component material(s) of the towel or mat are also specialized to prevent the influx and retention of sand and other loose ground particles.

Various embodiments for a collapsible cot are provided. A collapsible cot can include a first telescoping member, a second telescoping member, and folding support mechanisms. Each of the folding support mechanisms can include a crossmember, a first arm having a first end pivotably coupled to a first side of the crossmember and a second end slidably coupled to the first telescoping member, and a second arm having a first end pivotably coupled to a second side of the crossmember and a second end slidably coupled to the second telescoping member. The second end of the first arm and second arm can include a coupler having a cross-section having a shape and size similar to a cross-section of the first telescoping member and the second telescoping member. The coupler can permit sliding of the at least one folding support mechanism along the first and second telescoping members.

A mattress has a cover sewn over a cushioned non-absorbent core and is suitable for use as a resting place or sleeping space. The core is made of a netted material having a plurality of tangled, partially bonded filaments. The cushions can have various densities separated by baffles inside the cover. The cover can have a built in or added back support system. The mattress is a self contained carry case and needs no additional carry bag. A detachable shoulder strap doubles to carry the mattress and as adjustable straps to adjust the back support system. The cushion is manufactured in various sizes for standard outdoor camping as well as sizes for standard indoor bedding.

A mattress has a cover sewn over a cushioned non-absorbent core and is suitable for use as a resting place or sleeping space. The core is made of a netted material having a plurality of tangled, partially bonded filaments. The cushions can have various densities separated by baffles inside the cover. The cover can have a built in or added back support system. The mattress is a self contained carry case and needs no additional carry bag. A detachable shoulder strap doubles to carry the mattress and as adjustable straps to adjust the back support system. The cushion is manufactured in various sizes for standard outdoor camping as well as sizes for standard indoor bedding.

A connecting piece (100) comprises a first body (101), two supporting legs (102) respectively connected to the left and right sides of the first body (101), a supporting arm (103) connected to the first body (101) and extends upward; the first body (101) has a first mounting hole (1011) opening forward; the supporting arm (103) has a second mounting hole (1031). It is convenient to assemble and simplifies the connection operation of a cot. A tensioning piece comprises a second body (201), a clamping portion (202), the second body (201) has a connecting hole (2011), the clamping portion (202) has an opening (2021) for clamping onto a side rod (400) of the cot, and the opening (2021) is arc-shaped. So it can be easily disassembled and assembled without additional tools. And a cot is convenient to store and disassemble and assemble.

A connecting piece (100) comprises a first body (101), two supporting legs (102) respectively connected to the left and right sides of the first body (101), a supporting arm (103) connected to the first body (101) and extends upward; the first body (101) has a first mounting hole (1011) opening forward; the supporting arm (103) has a second mounting hole (1031). It is convenient to assemble and simplifies the connection operation of a cot. A tensioning piece comprises a second body (201), a clamping portion (202), the second body (201) has a connecting hole (2011), the clamping portion (202) has an opening (2021) for clamping onto a side rod (400) of the cot, and the opening (2021) is arc-shaped. So it can be easily disassembled and assembled without additional tools. And a cot is convenient to store and disassemble and assemble.

Provided is a device for changing a frame angle of a foldable article. The device combines frames using a connecting and assembling member and an elastic string and makes up a leg or a support frame of the foldable article. The connecting and assembling member with which a first end of the elastic string is combined and which has multiple combination grooves in such a manner that the frame combined with a second end of the elastic string is selectively combined with the connecting and assembling member. The first end of elastic string is combined with the connecting and assembling member, and the second end of the elastic string is combined with the frame such that the frame can be elastically operated. The frame is combined with the first end of the elastic string and is elastically insertable into or separable from the connecting and assembling member.

Provided is a device for changing a frame angle of a foldable article. The device combines frames using a connecting and assembling member and an elastic string and makes up a leg or a support frame of the foldable article. The connecting and assembling member with which a first end of the elastic string is combined and which has multiple combination grooves in such a manner that the frame combined with a second end of the elastic string is selectively combined with the connecting and assembling member. The first end of elastic string is combined with the connecting and assembling member, and the second end of the elastic string is combined with the frame such that the frame can be elastically operated. The frame is combined with the first end of the elastic string and is elastically insertable into or separable from the connecting and assembling member.