Been having knee pains with my Nike plus sneakers so I decided to switch to these and buy&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/11-Assorted-Colors-Silicone-Pouch-Compatible-with-Nike-iPod-and-Nike-SportBand-Nike-Plus-Compatible-with-all-Shoes/dp/B001EZ402O/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">11 Assorted Colors Silicone Pouch Compatible with Nike+ iPod and Nike+ SportBand Nike Plus - Compatible with all Shoes</a>. I can still track my runs and after a few weeks of rest, my knee feels great while running in these. My area is pretty hilly so I do feel that more cushioning under the ball of my foot would be great for downhill running.