still got my nike boots

since i got those shoes after the first wearing i got these brown stuff on it. any tipps hiw to

British Chancellors Team Up to Warn of 'Brexit' still got my nike boots Single Britons Spend Half of Income on Rent as One-Bed House Prices Soar still got my nike boots At the 2016 Olympics in Rio, Fighting Zika Is Becoming a Blood Sport still got my nike boots Australian Prime Minister Malcolm Turnbull Rejects Calls To Quit After Election still got my nike boots

still got my nike boots Gold White Black Red Blue Beige Grey Price Rose Orange Purple Green Yellow Cyan Bordeaux pink Indigo Brown Silver