Other features include an oversized red AirWair heel loop, which makes it easier to pull these on over thick socks. Try some Adidas Yeezys or Nike x Sacais. The insole of the shoe, just like the rest of Kibo’s range, is made from FSC-certified cork and recycled rubber foam, and all of it is put together using only water-based glue, at a factory that has been accredited by the BSCI, which ensures workplace safety compliance and human rights standards. Wouter Hoogkamer, an academic at the University of Massachusetts, has studied the impact of Nike's technology on amateur runners. The SL:PDX took the Cyklon’s technology and elevated it to a much higher and more successful level.