Playing with straps on a few watches today. My A4 looks great on a black Maratac Zulu but it's a sporty and casual look. I tried my new Hirsch Pure strap on the A4 and think that it is the best looking strap for this watch. Dresses it up yet keeps it functional. Clean, Sharp lines. Could definitely be worn in many environments and to many occasions. Strap is very comfortable and thick.