R1
Boost your ultrarunning performance.
Key Features
- 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
S1
Get ready for your next ultra.
Key Features
- ZeroSag midsole insert with little degradation during long runs
- LightCELL midsole base featuring excellent lightness and bounce
- GOFLOW midsole geometry to guide your stride
- TPU heel cage with improved stability
- Jacquard engineered mesh upper with 100% recycled yarn
