Oregon is the only state to retain a double-sided flag with different images on each side. The middle part of the state seal appears on the obverse (front), consisting of a heart-shaped shield surrounded by 33 stars, the number of states in the Union when Oregon was admitted in 1859. Inside the shield is an allegorical landscape depicting a wagon train arriving at the Pacific Ocean, with the rising sun in the background. The scroll is printed with the state motto, "The Union", and below it is a wheat sheaf flanked by agricultural implements. The date and name are above and below the seal. The reverse side of the flag shows a beaver standing on its dam, and is a reminder of the early fur-trapping days.
Oregon flags for outdoor use are constructed of a durable nylon fabric especially developed for flag use. Nylon's tight weave provides maximum beauty and flyability as well as brilliant, fast colors. Its weave helps shed pollution, dirt and grime that the looser weave alternatives absorb. Nylon is water repellent and mildew resistant.