Taking the classic ZX series as it's base the ZX 1K Boost trainers bring comfort right up to date with a number of innovative features. Constructed from a durable ripstop upper with synthetic suede overlays these are as durable as they are comfortable. The mid sole is half Boost, half EVA for both stability and cushioning and the outsole a grippy rubber. This version comes in a ink navy colourway and the 3 stripes in white.