Buy each band separately, so you can mix and match if you want to.
4 bands = 1 pair (if you have Birkenstocks similar to the images).
Or maybe you just want one 'feature band' on each shoe...
Slide over your Birkenstocks to add more visibility and fashion to your life.
Also great for covering worn-out Birkenstocks to make them look new. :D
Made from an old shirt of mine, that wouldn't have been up to op-shop standard. (Great that could salvage the good parts of the garment.)