My leather Chelsea’s , which I adore, had become loose after wearing them daily to walk 5 miles daily. The shoes could still be worn comfortably and looked great but after 6 months , I’d noticed my feet slipping as I a walked. The friction caused blisters so my solution is the inner soles and that did the trick.. I can wear them for longer walks now but have chose , with warmer weather, to wear Lem’s running shoes. I love both shoes.