This question gets asked a lot (see these forums here and here); can they actually correct bunions?
Depends what you mean by “correct”. They will not make a bunion go away. They will not correct the alignment of the big toe. They will, however, lead to some small improvement in the alignment of the big toe and may be useful to helping pain deep inside the joint by keeping it mobile, but that is all. They do not live up to the marketing hype and the faked before and after photos. There are some resources on them here.