I’m also not sure you could reliably adjust it without causing damage, since the footing pieces and hardware seem flimsy and tightening and loosening will degrade integrity with more use. Se siente de buena calidad, la correa es suave al tacto, en medida me quedó bien, ajustó a la perfección. I bead earrings and honestly my end product looks awful compared to other beads Ive used. Streaming services work superbly with excellent quality and ease of use. Thank you Birkenstock for your excellent product and amazing service. They smell amazing and do not trigger any bad reactions. I will be purchasing a couple more for my other bikes. These will be used frequently. But over all super happy. The only weak point may be the 1/4” out mix plug on the rear of the base feeling loose.