The soles fit into a pair of winter boots Superfit brand, which I bought but the soles in 31, the boots in 32 because Superfit smallish fails. Thus, the soles fit as expected. In the boots were very thin insoles, one of which has been lost. There was functional and inexpensive replacement. Son in the first moment "My boots feel different," then he has but the soles accepted without hesitation. I think they keep the feet from below good warm.