Enter the running avenue and build fitness day after day. A "go-to" reliable trainer Women's Sonic RA delivers a comfortable responsive and dynamic ride that will keep you going mile after mile.

Features:

• The unique Vibe Technology midsole construction using EnergyCell and Opal to attenuate fatigue-causing vibrations for a cushioned yet responsive ride
• The RA's Geometric Decoupling axis is oriented to deliver a balanced effortless forward transition from contact to propulsion
• The road-specific Sensifit upper conforms to the contours of your foot and gently secures it in place giving you a virtually customized fit
• For training & racing
• Good for running in all weather
• 8 mm drop (28 to 20 mm)