![Amazon.com: CURREX RUNPRO - Professional Running Insole, Added Cushioning, Flexible Support, Increased Performance, Thin Shoe Inserts for Athletic, Comfort & Walking Shoes, Men and Women : Health & Household Amazon.com: CURREX RUNPRO - Professional Running Insole, Added Cushioning, Flexible Support, Increased Performance, Thin Shoe Inserts for Athletic, Comfort & Walking Shoes, Men and Women : Health & Household](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/610cuf+7mUL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: CURREX RUNPRO - Professional Running Insole, Added Cushioning, Flexible Support, Increased Performance, Thin Shoe Inserts for Athletic, Comfort & Walking Shoes, Men and Women : Health & Household
![This plastic hole filled with a foam insert underneath Nike sneaker sole insert, only in the left shoe : r/whatisthisthing This plastic hole filled with a foam insert underneath Nike sneaker sole insert, only in the left shoe : r/whatisthisthing](https://external-preview.redd.it/this-plastic-hole-filled-with-a-foam-insert-underneath-nike-v0-pLvHhWnnTeiRLHBOCFlV1dU1baKhGCTa_vyjPxgH35A.jpg?width=640&crop=smart&auto=webp&s=8e75d516ec0501f492a96cb506514e4ebdd0e016)
This plastic hole filled with a foam insert underneath Nike sneaker sole insert, only in the left shoe : r/whatisthisthing
![Nike Plus: insert the tracker in your sneaker then track your run on your iphone! So much cooler than a traditional pedometer. | Nike, Ipod, Workout music Nike Plus: insert the tracker in your sneaker then track your run on your iphone! So much cooler than a traditional pedometer. | Nike, Ipod, Workout music](https://i.pinimg.com/736x/b3/fa/1a/b3fa1ae3a55cdfbef3e58b668bf59158.jpg)