Swedish Blood Type patch with hook backing.
Our military desert model suites the M90K, M90TBE "khaki/beige" kit and has the same regulated size as Swedish Armed forces arm flag patch insignia.
Bloodtype patches have been around for a while now but we also have nationality "SWE" on ours as an extra twist and security to the soldier using it being treated by other lands medics. Size: 3,9 cm x 2,6