This is a handy little thing and it smells nice, too!  I used it to stretch a pair of hand-me-down shoes from my sister who wears a size smaller than me. I left the shoe tree in my shoe and used a 50/50 water/rubbing alcohol solution on the shoe (don't waste your time buying the "special" shoe stretch sprays -- this 50/50 solution does the trick!) and let it dry to shape. Did WONDERS for the fit of my shoes. I'd recommend these.