Fieg began working as a stock boy and salesman for David Z, his uncle's footwear chain, at the age of 13,[3] eventually becoming a manager and head buyer there.
[6] Fieg's new sneaker designs ended up on the cover of The Wall Street Journal, and sold out in 24 hours,[7] helping to launch him on a new career path.
He has since gone on to collaborate with many other brands such as Adidas, Caminando, Chippewa, Clarks, Converse, Harris Tweed, Herschel Supply, New Balance, Polo Ralph Lauren, PUMA,[8] Red Wings, Saucony, Sebago, Shades of Grey by Micah Cohen, and Timberland.
Kith carries brands including Yeezy, Stampd, Timberland, Adidas, Red Wing, Clarks, Asics, Danner, New Balance, Nike, Gourmet, and Native Footwear.
[12] Kith Treats is a bar offering 23 varieties of breakfast cereal[13] with assorted toppings and milk selections, as well as ice cream.
[17] Fieg also expanded the Kith treats business, including a collaboration with Cap'n Crunch, new pop-up shops and an accessories and apparel line.