The arch is sufficient but I tried an orthotic inside and although too snug for extended wearing time, the boots are roomy enough to accommodate the orthotic and my foot. These are easy to assemble! On the back, the top portion is attached to the bottom -- so unlike most Airpods cases, these ones stay together! I purchased this exact same style in a shoe store two years ago (for $20 more, of course), and I was surprised at that time to find myself needing a half-size larger than I had ever worn in 50 years of purchasing all kinds of footwear. Mi padre está encantado con ellas (¡Y mira que me cuesta encontrar calzado del que no se queje! These are a tighter knit material and are comfortable for my long shifts. They are a little thicker material than the original ones but that is probably a good thing. Well made and clothes don?t slip off the hangers. But if I compare the whole experience of listening to audio wearing these versus conventional headphones, its a different story. Not sure what it is in it that is really great for helping my skin but I?m not going to question it.