Marvel has teamed up with adidas to create this "Avengers" edition of the adiZero Feather 4. They come in a onix, silver metallic and solar green colorway. Featuring a grey-based upper with lime green accents and Avengers branding on the heel and insoles. A limited release, look out for them at select adidas accounts worldwide in early May of 2015. Retail is set at, $110.