While several color and wear test samples of the Nike Air Yeezy were made, some are more widely known and discussed than others. West wore an all black suede pair during his 2008 Grammy Awards performance of "Stronger" and "Hey Mama. " Up until after his performance, the public was unaware that a collaboration between Nike and Kanye West was in the works . This sample was later sold via an online charity auction to benefit the patients of the Doernbecher Children’s Hospital alongside an unreleased prototype of the Nike Air Yeezy featuring the tooling used on the popular Air Jordan VI. Mark Smith stated that Kanye wanted to use Jordan tooling on the Air Yeezy, but that Nike would not allow it, and therefore, before the date of the auction, Kanye was unaware that the "Jordan VI" Nike Air Yeezy sample existed. The other sample that was met with much discussion among fans of the shoe was the "Fire Red" Nike Air Yeezy, which was named for the bright red color on the midsole. This colorway was first worn by Kanye during his "Glow in the Dark" Tour and has been worn by the rapper several times since. According to industry rumors, this colorway was strongly considered for release alongside the other 3 release colorways, but was scrapped at the last minute.