Recognizing the special qualities of the insoles used in their Supermarine shoes during their collaboration with Feit, Outlier releases them as a standalone upgrade in two editions. The insoles are made of buffalo leather, which is both thick and allows for improved moisture absorption and the ability to mold to the shape of your foot. The insoles are also perforated from the ball of the foot to the toes adding another dimension of breathability. In addition to a flat version, the insoles are also available in a wedge version with an added 8mm layer of cork at the rear along with a thin layer of natural latex for breathability and shock absorption. The insoles are available for purchase at Outlier’s website with the Flat edition priced at $38 USD and the 8mm edition at $48 USD.