These pouches work great in out heat laminators -- and with just one pass. Pouch sizing is accurate, with excellent sealing quality. The viewing for each laminated item is a "clear as a bell". I also use a single pouch for laminating multiple items, such as 3x5 recipe cards, ID cards, smaller photos, labels and luggage tags. Each item placed inside a packet is then trimmed to the desired size. This saves on buying a large quantities of pre-trimmed packets, when only a few be used for a specific purpose. Even after trimming, the seal remains air and water-tight. Granted, the same thing can be done with a larger pouch, but to reduce waste, these are just the right size for quantities of smaller items.