Adidas Vigor 5 and 6 models now have the insole glued to the inside of the shoe, while the Vigor 4 insole was not glued.  I always remove running shoe insoles in order to insert my prescription orthotics.  The Vigor 5 and 6 models might fit and provide the same arch support as the Vigor 4, but I can't know that if I can't remove the insole and insert my orthotics.  I did not attempt to pull out the Vigor 6 insole because the shoe might not fit and then I wouldn't have been able to return the shoes.  I also like the materials and durability of the Vigor 4 for rugged trail running.  The Vigor 5 and 6 seem more like &#34;townie&#34; shoes or for low impact activities.  Adidas has lost a loyal customer if the Vigor is now going to be the quality of the 5 and 6 models.