I've had the PU soles disintegrate on two pairs of leather trainers this year. Never had this before but gather it is a well known problem with this type of sole and they are difficult and expensive to resole. I like leather trainers but it is frustrating if the uppers are fine but they can't be resoled. Looking now for leather trainers with soles that will last and ideally a bit of arch support although I can add insoles. I also have small feet - need size 35. Can anyone help?