(Relys on Bluetooth Pairing) Ive tried about all I know to try. Comes with all the bolts and anchors (if you feel necessary to use). They are so soft, the support is great, and they are machine washable. Everything about these shoes is amazing! Not a blister in site, the sole is padded, I didnt get a sweaty foot, no pressure points either. I dont know if I want to try to return these and get another set, or just return them for credit. These slippers are garbage and anyone buying might as well just send a donation because you get no value for your money. So I purchased two of them and now my OCD is at ease. I cant say enough great things about these. so I took it on my first vacation and wasnt too keen on the size at first but now I love it.