Have you ever wanted your sneakers / shoes to feel like your Birkenstock footwear? These insoles provide the needed arch support and convert your footwear to have a similar fit and feel as your Birkies. Like-new (minimally used, less than 10 miles) Birkenstock Blue Footbed Insoles (EU size 40, see sizing chart photos). Unisex. No flaws or defects or any kind; minimal discoloration from light use with socks. These do not have any sort of funky odor (if you’re wondering). I was encouraged to buy these inserts a 1/2 size smaller than my most common footwear size if that is useful ( I think this is also true for their cork footwear line!) Bundle and save 15% on any 2+ items! Same day or next day shipping (excluding weekends and holidays due to USPS hours)!