USPS Olympic Commemorative Envelopes 2004-2006

Got a stack of four vintage US Olympic commemorative envelopes here. These are from the early 2000s, specifically covering the Athens 2004 Summer Games and the Torino 2006 Winter Games. They've got the cool stamps and athlete imagery on them. They are opened and have some wear from being mailed, but still pretty neat for a collector or someone into sports history. Selling the whole lot together.