An element is configured to be installed together with a tape to form a fastener stringer, and includes: a main body including an upper main body and a lower main body; an installing portion for installing the tape; a head; and a neck connecting the main body and the head, wherein at least one of the upper main body and the lower main body includes a convex portion and a base portion, the convex portion protrudes from the base portion and extends in the left-right direction at an intermediate position in the front-rear direction. An inclined portion inclined downward along the left-right direction is formed on at least one side of the head along the upper-lower direction, and protrusions extending in the front-rear direction are formed on both sides of the convex portion.

A copper alloy for fastening wherein the alloy has a structure of a mixture of -phase and a -phase; and wherein the alloy has a composition represented by the general formula: Cu.sub.bal.Zn.sub.aMn.sub.b, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34a40.5, 0.1b6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b(8a+300)/7, where 34a<37.5 and equation (2): b(5.5a+225.25)/5, where 35.5a40.5.

A copper alloy for fastening wherein the alloy has a structure of a mixture of -phase and a -phase; and wherein the alloy has a composition represented by the general formula: Cu.sub.bal.Zn.sub.aMn.sub.b, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34a40.5, 0.1b6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b(8a+300)/7, where 34a<37.5 and equation (2): b(5.5a+225.25)/5, where 35.5a40.5.

An apparatus comprising a zipper slider with a front face and a substantially planar-shaped zipper slider holder. The zipper slider holder has a holder front face and a holder rear face, the holder rear face fixedly connected to the zipper slider front face, the zipper slider holder shaped and sized to facilitate gripping by a human hand without the use of a pull tab.

Provided is a polyamide resin composition for a slide fastener that includes at least one polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition; wherein poly(m-xylylene adipamide) (MXD 6) accounts for 60% by mass or more of the polyamide resin; wherein reinforcing fibers account for 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers; wherein both first reinforcing fibers having a fiber diameter of from 5 to 7 m and second reinforcing fibers having a fiber diameter larger than that of the first reinforcing fibers by more than 2 m account for 90% by mass or more of the reinforcing fibers; and wherein the first reinforcing fibers account for 20% by mass or more and less than 50% by mass of the reinforcing fibers.

Provided is a polyamide resin composition for a slide fastener that includes at least one polyamide resin and reinforcing fibers, wherein a total mass of the polyamide resin and the reinforcing fibers accounts for 90% by mass or more of the composition; wherein poly(m-xylylene adipamide) (MXD 6) accounts for 60% by mass or more of the polyamide resin; wherein reinforcing fibers account for 45 to 70% by mass of the total mass of the polyamide resin and the reinforcing fibers; wherein both first reinforcing fibers having a fiber diameter of from 5 to 7 m and second reinforcing fibers having a fiber diameter larger than that of the first reinforcing fibers by more than 2 m account for 90% by mass or more of the reinforcing fibers; and wherein the first reinforcing fibers account for 20% by mass or more and less than 50% by mass of the reinforcing fibers.

An article of clothing, in particular a protective vest, the size of which can be adjusted. At least one outer zipper with two rows of teeth is provided. The article of clothing has a first size in a closed state of the outer zipper and a second size in an open state of the outer zipper, wherein the first size is smaller than the second size. In the open state of the outer zipper, the rows of teeth are held together at a distance from each other by material which is at least partly covered by the outer zipper in the closed state of the outer zipper. An inner zipper with two rows of teeth is provided, said zipper being at least partly covered by the outer zipper in the closed state of the outer zipper and being exposed in the open state of the outer zipper.

An article of clothing, in particular a protective vest, the size of which can be adjusted. At least one outer zipper with two rows of teeth is provided. The article of clothing has a first size in a closed state of the outer zipper and a second size in an open state of the outer zipper, wherein the first size is smaller than the second size. In the open state of the outer zipper, the rows of teeth are held together at a distance from each other by material which is at least partly covered by the outer zipper in the closed state of the outer zipper. An inner zipper with two rows of teeth is provided, said zipper being at least partly covered by the outer zipper in the closed state of the outer zipper and being exposed in the open state of the outer zipper.

A secure mattress casing comprises a top portion configured to fit over a top portion of a mattress; a bottom portion configured to fit over a bottom portion of the mattress; one or more side portions configured to fit over one or more side portions of the mattress; a sealing element attached to at least one of the one or more side portions, and configured to open and close the secure mattress casing, the sealing element having a terminal gap; and a backflap configured to cover the terminal gap, thereby securely sealing the mattress within secure mattress casing, the sealing element including a first portion and a second portion, the first portion of the sealing element disposed along a length of the one or more side portions, the second portion extending into the backflap, the backflap configured to fold and to use one or more connector mechanisms to retain the backflap in a folded position

A secure mattress casing comprises a top portion configured to fit over a top portion of a mattress; a bottom portion configured to fit over a bottom portion of the mattress; one or more side portions configured to fit over one or more side portions of the mattress; a sealing element attached to at least one of the one or more side portions, and configured to open and close the secure mattress casing, the sealing element having a terminal gap; and a backflap configured to cover the terminal gap, thereby securely sealing the mattress within secure mattress casing, the sealing element including a first portion and a second portion, the first portion of the sealing element disposed along a length of the one or more side portions, the second portion extending into the backflap, the backflap configured to fold and to use one or more connector mechanisms to retain the backflap in a folded position