An embodiment includes a bag comprising mesh and film side walls and a reinforcing strip of film; wherein (a) the mesh side wall is sealed to opposing side edges of the film side wall; (b) the reinforcing strip of film is sealed to an upper portion of the mesh side wall and to the opposing side edges of the film side wall; (c) the film side wall has a bottom extension, which is monolithic with the film side wall, extending upwardly and sealed along a lateral extent of a bottom portion of the mesh side wall; (d) the film side wall is non-coplanar with a portion of the bottom extension; (e) another portion of the bottom extension is non-coplanar with the mesh side wall; and (f) a horizontal axis intersects the bottom portion of the film side wall and three portions of the bottom extension.

An embodiment includes a bag comprising mesh and film side walls and a reinforcing strip of film; wherein (a) the mesh side wall is sealed to opposing side edges of the film side wall; (b) the reinforcing strip of film is sealed to an upper portion of the mesh side wall and to the opposing side edges of the film side wall; (c) the film side wall has a bottom extension, which is monolithic with the film side wall, extending upwardly and sealed along a lateral extent of a bottom portion of the mesh side wall; (d) the film side wall is non-coplanar with a portion of the bottom extension; (e) another portion of the bottom extension is non-coplanar with the mesh side wall; and (f) a horizontal axis intersects the bottom portion of the film side wall and three portions of the bottom extension.

A packaging bag for packaging water-absorbent resin powder includes a resin sheet with gas barrier properties which is formed in a bag shape having a charge opening for charging the water-absorbent resin powder into the packaging bag. At least one resin sheet piece of the resin sheet is provided with an incision penetrating the resin sheet piece in a thickness direction thereof, the incision having a dimension not larger than a predetermined length according to a mass median particle size of the water-absorbent resin powder.

A packaging bag for packaging water-absorbent resin powder includes a resin sheet with gas barrier properties which is formed in a bag shape having a charge opening for charging the water-absorbent resin powder into the packaging bag. At least one resin sheet piece of the resin sheet is provided with an incision penetrating the resin sheet piece in a thickness direction thereof, the incision having a dimension not larger than a predetermined length according to a mass median particle size of the water-absorbent resin powder.

A pouch according to an embodiment is a pouch having an accommodation space that accommodates contents, and including a pair of sheets, and a pair of side seal portions sealed to form the accommodation space, wherein at least one of the pair of side seal portions includes a first seal portion located near the top portion, a second seal portion located near the bottom portion and separated from the first seal portion, and a steam discharge seal portion configured to connect the first and second seal portions, to protrude to the accommodation space side, and to release steam, a portion formed by a first region between the first and second seal portions and a second region surrounded by the first region and the steam discharge seal portion is an unsealed region, and a penetration portion that passes through at least one sheet in a thickness direction is formed in the unsealed region of the at least one sheet.

A pouch according to an embodiment is a pouch having an accommodation space that accommodates contents, and including a pair of sheets, and a pair of side seal portions sealed to form the accommodation space, wherein at least one of the pair of side seal portions includes a first seal portion located near the top portion, a second seal portion located near the bottom portion and separated from the first seal portion, and a steam discharge seal portion configured to connect the first and second seal portions, to protrude to the accommodation space side, and to release steam, a portion formed by a first region between the first and second seal portions and a second region surrounded by the first region and the steam discharge seal portion is an unsealed region, and a penetration portion that passes through at least one sheet in a thickness direction is formed in the unsealed region of the at least one sheet.

A washable laundry bag includes a water permeable and air permeable material that forms a wall of a laundry bag and means for expanding the wall of the bag to substantially match an interior surface of a washing machine tub or a dryer drum. The means may be magnets that couple the bag to the interior of the tub or drum, spring mechanisms that spring the walls of the bag outwardly, or a combination thereof.

A washable laundry bag includes a water permeable and air permeable material that forms a wall of a laundry bag and means for expanding the wall of the bag to substantially match an interior surface of a washing machine tub or a dryer drum. The means may be magnets that couple the bag to the interior of the tub or drum, spring mechanisms that spring the walls of the bag outwardly, or a combination thereof.

Provided is a perforated plastic bag wherein the volume of said bag is 100 liters or more; wherein the average perforation diameter is 500 micrometers or less; wherein said plastic bag comprises a lower zone and a top zone, wherein the perforation density of said lower zone is greater than the perforation density of said top zone. Also provided is a method of using such a plastic bag.

Provided is a perforated plastic bag wherein the volume of said bag is 100 liters or more; wherein the average perforation diameter is 500 micrometers or less; wherein said plastic bag comprises a lower zone and a top zone, wherein the perforation density of said lower zone is greater than the perforation density of said top zone. Also provided is a method of using such a plastic bag.