Reflective Birkenstock Scrunchie (or other sandals).
Buy each band separately, so you can mix and match if you want to.
4 bands = 1 pair (if you have Birkenstocks/Sandals similar to the images).
Or maybe you just want one 'feature band' on each shoe...
Slide over your sandals to add more luminosity to your life.
Also great for covering worn-out Birkenstocks to make them look new. :D
Made from a black cotton-drill leftover fabric roll.