![Amazon.com: Birkenstock Unisex Birko Sport Arch Support - Sport Blue Insole 43 (US Women's 12-12.5, US Men's 10-10.5) Medium : Health & Household Amazon.com: Birkenstock Unisex Birko Sport Arch Support - Sport Blue Insole 43 (US Women's 12-12.5, US Men's 10-10.5) Medium : Health & Household](https://m.media-amazon.com/images/I/71ckVR6dfKL._AC_SL1500_.jpg)
Amazon.com: Birkenstock Unisex Birko Sport Arch Support - Sport Blue Insole 43 (US Women's 12-12.5, US Men's 10-10.5) Medium : Health & Household
![Upgrade Your Birkenstocks With a Pair of Affordable Replacement Insoles | Birkenstock insoles, Birkenstock, Shoes hack Upgrade Your Birkenstocks With a Pair of Affordable Replacement Insoles | Birkenstock insoles, Birkenstock, Shoes hack](https://i.pinimg.com/originals/d5/e0/f3/d5e0f3f994565ad14f44cc974b0d35ba.jpg)
Upgrade Your Birkenstocks With a Pair of Affordable Replacement Insoles | Birkenstock insoles, Birkenstock, Shoes hack
![Boston fit improvement. I have quite narrow feet and these inserts, though not ideal (minor sticky separation sound when you lift off while walking) have made them functional to use. They otherwise Boston fit improvement. I have quite narrow feet and these inserts, though not ideal (minor sticky separation sound when you lift off while walking) have made them functional to use. They otherwise](https://preview.redd.it/boston-fit-improvement-i-have-quite-narrow-feet-and-these-v0-ti3fwyoe6kf91.jpg?auto=webp&s=36d0adc30e635f652007ffc80c0391747215e9c9)