A poly Gusset Bag has sides or a bottom that allow you to package thicker or bulkier, larger items by having extra material on the sides or bottom that expand. Gusseted bags are excellent for displaying multiple-piece products. There are four common styles of gusset bags:
Flat Bottom or FB Gusset Bags can be clear with a flat bottom and are very often shaped like a brown paper lunch bag.
Heavy Duty or HD side gusset poly bags have an area in the back of the bag where the seal is and they are made from a thicker mil poly, which therefore makes them much more durable or stronger.
Standard Poly or GB Gusset Bags are very often clear and almost always have no back or side seams. A common example is seen in standard garbage bags.
Bottom Gusset or BG Bags work great for being placed in a container or basket.