What is a side gusset? Side gusset bags and pouches are less box-shaped, which means they usually take up less space on the shelf. ... Side gusset bags are a popular choice for snack food flexible packaging, dry ingredient packaging and even frozen food packaging. What is gusseted pouch? Gusseted pouches are pouches with an extra layer called gusset added in order to increase the size & strength of the pouch. These gussets can be attatched either at the botton or on the sidesbasis their requirement. What is a gusset used for? Gussets, sometimes known as gusset plates, used as side gusset coffee bags, are metal sheets of various thicknesses used for either joining two or more components together or strengthening joints. These components include beams, girders, truss members, chords, and columns.