Y3 Kozoko Low in Olive / Black. The Y3 Kozoko Low is one of the most recent additions to the lineup and another utilising the ultra comfortable Boost sole unit. It's padded neoprene sock-like upper also aids comfort whilst the rubber Continental outsole provides additional traction. The Torsion System built into the sole unit adds a level of underfoot support along with the plastic heel counter. TPU welded panels adorn the toe panel whilst Y-3 branding sits on the heel.