AFI dictates backpack guidelines Published July 26, 2013 28th Bomb Wing Public Affairs ELLSWORTH AIR FORCE BASE, S.D. -- In accordance with Air Force Instruction 36-2903, "Dress and Personal Appearance of Air Force Personnel," Airmen must ensure any backpacks worn while in uniform fit within certain parameters. Black backpacks may be worn with any uniform combination, but solid-color black backpacks are the only versions authorized while wearing any blue uniform. Airman battle uniform-patterned, olive drab or sage green backpacks may be worn with the ABU. Small logos are authorized, but backpacks with ornamentation, a high gloss, designs or hanging or dangling objects are not approved to wear while in uniform. Backpacks may have small gold or silver clasps, but no chains. Airmen may wear a backpack on their left shoulder, or on both shoulders, so as not to interfere with rendering a proper salute. For more information, call the 28th Force Support Squadron Military Personnel Element customer service section at (605) 385-2427.