One side of the bag is longer than the other which allows the bag to be opened more easily. Add your own logo, business address, biohazard symbol or whatever art you wish. You can also seal the bag with an impulse sealer or one of our other closure options. Thes can be made with flat flush cut bottom, an offset lip for easier loading and even with a lip and tape bottom closure. Available in Polyethelyne and in Polyproplene.