Airmen trying to keep chilly temperatures from affecting their workout may have a difficult time finding the Air Force improved physical training uniform, or IPTU, pants and jackets this spring and summer. There will be a transition period as the legacy stock is depleted and the new stock is ordered. The shorts have already transitioned and the T-shirt is not affected. (U.S. Air Force photo by Airman 1st Class Kimberly Nagle/Released)