All Uke Leash components use the same buckle system, so you can mix and match colors and materials as much as you want. Select a different Headstock strap to compliment each ukulele in your collection. You have your choice of the "Suede side out" or the "Smooth side out". There is a difference in color and texture, as you can see in the photos. In my opinion, the Smooth side of the leather is a little bit softer than the suede side with these leathers. So, if you are looking for the softer surface as far as the strap contacting the ukulele, I would suggest choosing Suede Side out.