LIGHTWEIGHT SUPPORT AND BREATHABILITY The Nike Flyknit Trainer Unisex Shoe is made with Flywire cables and an ultra-lightweight Flyknit upper for adaptive support and ventilation while you're on the move. Benefits Nike Zoom Air in the heel and forefoot for lightweight comfort Flyknit upper for a lightweight fit and excellent breathability Flywire cables that integrate with the laces for lightweight support and an adaptive fit Rubber Waffle outsole for traction and durability Reinforced outsole pods for durability in high-wear areas Flyknit Origins Nike Flyknit technology was inspired by feedback from runners seeking a shoe with the snug (and virtually unnoticed) fit of a sock. Nike embarked on a four-year mission with teams of programmers, engineers and designers to create the technology needed to make the knit upper with static properties for structure and durability. Then the precise placement of support, flexibility and breathability—all in one layer—was refined. The result is a featherweight, formfitting and virtually seamless upper. This unprecedented precision maximizes performance while reducing material waste by an average of 60% compared to traditional cut and sew, saving millions of pounds of material from reaching landfills.