Stretching Non-leather Shoes?
FYI: a lot of man-made materials typically wont stretch very much, i.e.: plastic or poly-type materials.
Homemade Liquid Shoe Stretch?
@ Tizzette, You might want to position the stretcher at 90 degrees from the normal position, in the instep, and try opening the stretcher. We used to use this method on boots purchased by customers who had a high insteps. We also would use a stretching solution...