These are overall very solid quality. They have a firm bottom, almost like a slab of wood covered in the soft material, so there is little flexibility there which can be awkward to walk in if you're not used to that. That also means that they can make a fair bit of noise on hard floors unless you're extra careful, if you're worried about that. Unlike the bottom, the top (the part covering your foot) is entirely made of softer material and appears to be attached to the bottom fairly well. It's held up fine to infrequent usage since purchasing in December 2022 (six months ago as of this review), though I'm not entirely confident they will hold up over several years. They don't seem egregiously poorly put together, but the craftsmanship doesn't seem exceptional either.