The hitch pin is a screw in type with clip. Pretty minimal breaking in, and they provided enough support that my hips didn’t ache (a problem I often have with unsupportive shoes). En efecto, son ajustados por su diseño tipo calcetín, sin embargo, con un calzador entran rápida y fácilmente; incluso, sin desatar los cordones. Fortunately, with a light touch, I got it out again and all is well. my toddler is 2 almost 3 and she wears a size 7 and I always get her a size bigger so I got a 8 and she will definitely got grow them when the summer is over, Im just going to keep them for now and buy another pair when she out grows these. I love my gym. However, we had to return it because my son didnt like the fact that it showed dust, picky kid. The build quality doesn’t disappoint. Pairing them with my phone was too easy. It was easy enough to build and took around an hour.