Runner 4D IO 'Triple Black'

Through experimentation and expression, Y-3 transforms a running style for the new era. The transparent upper of the Runner 4D IO shoes reveals the adidas Primeknit sock underneath, detachable with a hook-and-loop construction. An innovative fusion of light, oxygen and liquid resin fuel the midsole, delivering precisely-tuned cushioning.

Mesh Upper with Removable adidas Primeknit Sock
Lightweight Feel
Neoprene and Mesh Lining
adidas 4D Midsole
Continental Rubber Outsole
Detachable Tongue
Product Colour: Black / Black / Core White
Product Code: FZ4502

This product is in Men's UK sizing.