The R1 features a CPU outsole with an exceptional light weight of 8.5 oz (US M9), but may produce noticeable noise on rainy days or on wooden floors.

TUNEDFIT Dual Lacing System for separate lace adjustment

Dual-zone ZeroSag midsole inserts with little degradation during long runs

LightCELL midsole base featuring excellent lightness and bounce

GOFLOW midsole geometry to guide your stride

Double-layered jacquard upper with 40% recycled polyester

Recognized with APMA Seal of Acceptance for promoting good foot health