When the Nike Flynit series first made its way to retailers, there were a good amount of stray pairs that saw a super limited releases. The Nike Flyknit Racer “USA” was one of those, with Nike Sportswear’s 21 Mercer spot in NYC being the only stateside spot to get any in stock. Pictured here is an even rarer find, an alternate sample version of the Nike Flyknit Racer. The big difference on these comes in the form in the extra bit of volt used, which shows up on the top half of the sole up near the toe. See more after the jump and then grab this Nike Flyknit rarity from uregenerate on eBay.